Solve the word problem. Show working out.

Question

Mary’s salary is 10% more than Alice’s. If their total salary is $4200, what is Mary’s salary?

Answer 1

$22,000

22+20 = 4200

22 is 20 + 10% of 20 = 20+2 = $22,000

Mary's is 10% more than Alice's

M=A + .1A = 1.1A

M+A = 42000

1.1A + A = 4200

2.1A = 4200

A = 4200/2.1 = 20000

M = 1.1(20000) = $22,000