Question

Please help me solve these equations!!!!

1/2x + 3y =4 for x , when y = 6

3/4x + 3y = 12 for x , when y = 5

5x + 3 y + 15 when x = 0

5x - 4y = 20 for y , when x = 3

Answer 1

1) 20

2)24

3) you didn't state the value of y

4)8.75

Explanation: