Question

Х+у= 20
3х – 3 = 30

Which of x and y satisfy this system of equations?

Answer 1

x = 11, y = 9

Explanation:

Given the 2 equations

x + y = 20 → (1)

3x - 3 = 30 → (2)

In (2) add 3 to both sides

3x = 33 ( divide both sides by 3 )

x = 11

Substitute x = 11 into (1)

11 + y = 20 ( subtract 11 from both sides )

y = 9