Question

What is the value of s? 0.7(3s+4)−1.1s=7.9

Answer 1

2.1s+2.8-1.1s=7.9        Distribute the 0.7 in the parenthesis

s+2.8=7.9                    Combine like terms which in this case is 2.1s and -1.1s

s=5.1                            Subtract 2.8 from both sides.

Answer 2

2.1s + 2.8 - 1.1s = 7.9
2.1s - 1.1s = 7.9 - 2.8
1s = 5.1
S = 5.1