Use substitution to solve each of the following pairs of simultaneous equations.

a) 2x + 7y = 17

x = 1 - 3y / 4

b) - 2x - 3y = - 14

x = 2 + 5y / 3

c) 3x + 2y = 6

y = 3 - 5x / 3

Part a, hopefully it is right

I will go for a part the rest You can do by yourself

Step-by-step explanation:

Multiply the second equation to get same amount of x in both equations

2x=2-3y/2

multiply both equations by 2 to get rid of the fraction in second equation

4x+14y=34

4x=4-3y

subtract equation (2) from equation (1)

14y=30+3y

11y=30

y=30/11, x=-23/22