Question

Solve for x using
cross multiplication.
x 1 = 2x + 4 5
x = [?]

Answer 1

x = -7

Explanation:

Given:

Required:

Find x using cross multiplication

Solution:

Cross multiply

(2x + 4)*4 = (x - 1)*5

8x + 16 = 5x - 5

Collect like terms

8x - 5x = -16 - 5

3x = -21

Divide both sides by 3

x = -21/3

x = -7