## Prealgebra (7th Edition)

7x-1=8x+4 Add 1 to both sides of the equation 7x-1 + 1=7=8x+4 +1 Simplify 7x =8x + 5 Subtract 8x from both sides 7x -8x =8x + 5 -8x Simplify -x = 5Divide both sides by -1 $\frac{-x}{-1}$ = $\frac{5}{-1}$ x = -5 The solution is -5 Check 7x-1=8x+4 7(-5) -1 =8(-5)+4 Multiply -35-1= -40 +4 -36=-36