Question

ractice solving equations with rational numbers.

Find the value of the variable using these steps.

0.4x + 3.9 = 5.78

1. Subtraction property of equality

2. Division property of equality

x =

Answer 1

Start with 0.4x + 3.9 = 5.78.

1. Subtraction property of equality: subtract 3.9 from both sides
0.4x = 5.78 − 3.9 = 1.88

2. Division property of equality: divide both sides by 0.4
x = 1.88 ÷ 0.4 = 4.7

(As a fraction: x = 47/10.)