Answer:
Each of the pair of shoes for her sisters are $55
Step-by-step explanation:
150 = 40 + 2x
110 = 2x
55 = x
$55
its $150 - $40 = $110
$110 / 2 = $55
x = 11
Given the expression;
5x+2y=67 ...1
x=3y−7 ....2
Substitute 2 into 1
5(3y-7)+2y = 67
15y - 35 + 2y = 67
17y = 67+35
17y = 102
y = 102/17
y =6
Recall that x = 3y - 7
x = 3(6) - 7
x = 18 - 7
Hence the value of x is 11
185
c
