x = 220
z = 22
Explanation:
SP = selling price
CP = cost price
Profit % = (SP - CP) / CP x 100%
10% = (242 - x) / x • 100%
10/100 = (242 - x)/x • 100/100
1/10 = (242 - x)/x • 1
1/10 • x = 242 - x
x/10 = 242 - x
x/10 • 10 = (242 - x) • 10
x = 2420 - 10x
x + 10x = 2420
11x = 2420
x = 2420/11
x = 220
Profit = SP - CP
z = 242 - x
z = 242 - 220
z = 22
