Question

Solve system
3x = 5 + 4y
x - 10 = -7y

Answer 1

Rewrite in Standard Form
3x-4y=5
x+7y=10

Or Substitute x as
3x=5+4y
x=-7y+10

Solve Equation
3(-7y+10)=5+4y

y=1

x=-7*1+10
x=3

= (3,1)