Question

Solve this system by substitution 7x-y=3
y=x+3​

Answer 1

7x-y=3 (1)

y=x+3​ (2)

Replace y = x + 3 in (1) => 7x- (x + 3) = 3

=> 6x-3 = 3 => x = 1 => instead of (2) => y = 4

So: x = 1, y = 4 is the solution of the system of equations

Explanation: