5x + 8xy + 10x + 3xy = 15x + 11xycombine like terms (the x's and the xy's)
Multiply the bottom equation by -1
If: x = 7 Then: y = (2*7)+3 = 17 And: 5x+y = (5*7)+17 = 52
5x + 17 = 7x - 123 123 + 17 = 7x - 5x 140 = 2x x = 140 ÷ 2 x = 70
3x = 24, x = 8
5x + 8xy + 10x + 3xy = 15x + 11xycombine like terms (the x's and the xy's)
5x+3 = -17 5x = -17-3 5x = -20 x = -4
Multiply the bottom equation by -1
5x + 3y = 17 is in its simplest form because there are no alike terms to combine.
(1, 4)
If: x = 7 Then: y = (2*7)+3 = 17 And: 5x+y = (5*7)+17 = 52
5x + 17 = 7x - 123 123 + 17 = 7x - 5x 140 = 2x x = 140 ÷ 2 x = 70
3x = 24, x = 8
3X - 23 + 4X + 6 = 5X + 8combining like terms, 7X - 17 = 5X + 8subtracting 5X and adding 17 to each side, 7X - 5X = 8 + 17Then, 2X = 25X = 12.5
9x + 5 = 5x + 179x + 5 - 5x = 179x - 5x = 4x5-4x=1717-5=1212 divided by 4 = 3x=3
3x + 5x = 348x = 34x = 34/8x = 17/4 orx = 4.25
33