Rearrange the first equation 2x + y = 20 take away 2x from both sides y = 20 - 2x substitute this y value into the second equation 6x - 5(20 - 2x) = 12 6x -100 +10x = 12 add 100 to both sides 6x + 10x = 112 16x = 112 divide both sides by 16 x = 7 Substitute this x value into the first equation to get y. 2(7) + y = 20 14 + y = 20 take away 14 from both sides y = 6
