Question

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

Answer 1

part a, hopefully it is right

Answer 2

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

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