Question

The total cost of 7 shirts and 5 pairs of pants is $517. The total cost of a shirt and a pair of pants is $89. How much does a pair of pants cost?​

Answer 1

pair of pants = $53

Explanation:

s = shirts

p = pair of pants

eq = equation

eq 1: 7s + 5p = 517

eq 2: s + p = 89

multiply the equation 2 by 7

eq 3: 7s + 7p = 623

negate equation 1 and add it to the eq 3

7s + 7p = 623

+ -7s - 5p = -517

2p = 106

p = 53