Question

What is the value of x in this proportion?

Choose one of the choices below



2/7=−5x+3


x=−20 1/2

x=−19

x=−16

x=−14 1/2

Answer 1

(a) -20 1/2

Explanation:

The proportion can be solved using "cross multiply" as the first step. This eliminates the fractions and turns it into a linear equation.

2/7 = -5/(x +3) . . . . . given

2(x +3) = -35 . . . . . . multiply by 7(x +3)

2x = -41 . . . . . . . . . simplify, subtract 6

x = -20 1/2 . . . . . . divide by 2