Question

1. Find the valve of x - y , if 2x+2y= 16 and 8x - 2y = 44

A 2 B 4 C 6 D 8 E 10

Find the value of 2x - y If x + y = 8 and 4x - y = 22
A 2 B 4 C 6 D 10

If 3x - y = 5 and 2x + y = 15 , evaluate x ^ 2 + 2y
A 29 B 30 C 35 D 42

Find the value of x - y If 2x + y = 8 and 4x - y = 22
A 2 B 5 C 7 D 3​

Answer 1

1. x = 6 and y = 2

x - y 6 - 2 = 4

2. x = 6 and y = 2

2x - y 2(6) - 2 = 12 - 2 = 10

3. x = 4 and y = 7

x² + 2y 4² + 2(7) = 16 + 14 = 30

4. x = 5 and y = -2

x - y 5 - - 2 = 5 + 2 = 7

Explanation: