Question

Solve the systems by substitution.
y=4x+6
y = 7x

Answer 1

x = 2

y = 14

Explanation:

{y = 4x + 6;

{y = 7x;

.

Let's replace y in the second equation with the value given in the 1st equation:

4x + 6 = 7x

4x - 7x = -6

-3x = -6 / : (-3)

x = 2

x = 2y = 4 × 2 + 6 = 8 + 6 = 14