Solving 2 Step Equations
 It is important to learn this process, so thatyou can apply it to more difficult equations!Solving Two-Step Equations left sideEvery equation has 2 sides, separated by the = sign.4 + x =12right side The solution to an equation is expressedas an equation with the variable ALONE on one side.The solution is :   y = 2example:    y + 3 = 5 We also use INVERSE OPERATIONS.The inverse of multiplication is division.The inverse of division is multiplication.The inverse of subtraction is addition.The inverse of addition is subtraction. Example  1The inverse of addition is subtraction, so we needto subtract 9 from both sides of the equation.We need to UNDO the 9, which is added to p.p  +  9  =  12p-9=- 93You must showthe steps of solving yourequations in this manner! Example  2We need to UNDO the 3, which is subtracted from s.The inverse of subtraction is addition, so we needto add 3 to both sides of the equation.ss  -  3  =  17+3=+ 320You must showthe steps of solving yourequations! Example  3The inverse of multiplication is division, so we needto divide both sides of the equation by 5.We need to UNDO the 5, which is multiplied by x.÷ 5x    =     35x5=÷  57You must showthe steps of solving yourequations! We use this same process when more thanone number is on the same side of the equation as the variable.However, it is important to remember to use inverse operations to undo ADDITION or SUBTRACTION BEFOREundoing MULTIPLICATION or DIVISION.    Use inverse operations to undo the constantbefore undoing the coefficient.Coefficient4x+9=21Constant Example 14x4x      =  12 4               4+x-   99==- 9213solutiondivide both sides by 4subtract 9 from both sides Example 22p  -  3  =  272p         =   302p      =  15+ 3+3 2add 3 to both sidessolutiondivide both sides by 2 Make sure you type in the+ addition or - subtractionsign on both sides.SLOW DOWN!! You have to put in answerson the next screen. Your turn!5y   -  15    =  20Fill in the missing numbers.5y     =    35y    =Type in the + or -sign and the number. Solve these two step equations.3y  +  8    =  233y     =    15y    =Type in the + or -sign and the number. Solve these two step equations.4y  -  1    =  154y     =    16y    =Type in the + or -sign and the number. Solve these two step equations.5y   -  4    =  365y     =    40y    =Type in the + or -sign and the number. Solve these two step equations.y   -  1    =  25xy     =5y    =xType in the + or -sign and the number. Solve these two step equations.y   +  14    =  233xy     =3y    =xType in the + or -sign and the number. Solve these two step equations.y   -  9    =  154xy     =4y    =xType in the + or -sign and the number. Solve these two step equations.7y   -  9    =  54y    ==Type in the + or -sign and the number. Solve these two step equations.4y   +  1    =  33y    ==Type in the + or -sign and the number. Solve these two step equations.3y   -  8    =  22y    ==Type in the + or -sign and the number. Solve these two step equations.2y   +  7    =  17y    ==Type in the + or -sign and the number. Solve these two step equations.7y   +  9    =  44y    ==Type in the + or -sign and the number.
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