Chapter 3 - Section 3.3 - Solving Linear Equations in One Variable - Exercise Set - Page 188: 7

The solution is -45

-14x-20= -12x+70 Subtract 12x to both sides -14x-20 +12x= -12x+70 +12x Simplify -2x -20=70 Add 20 to both sides -2x -20 +20=70 +20 Simplify -2x=90 Divide both sides by -2 $\frac{-2x}{-2}$=$\frac{90}{-2}$ x=-45 The solution is -45 Check -14x-20= -12x+70 -14(-45)-20= -12(-45)+70 630-20=540 +70 610=610