9x+6 = 7x+18 9x-7x = 18-6 2x = 12 x = 6
4X - 32 + 5X + 50 = 180 gather like terms on the left 9X + 18 = 180 subtract 18 from each side 9X = 162 divide both sides by 9 X = 18 -------- check 4(18) - 32 + 5(18) + 50 = 180 72 - 32 + 90 + 50 = 180 40 + 90 + 50 = 180 180 = 180 checks
8x+9=9x-18+9 = 8x+9=9x-9 = 1x=0 (:
It is possible.
9x + 3y = -54 3y = -9x - 54 y = -(3x + 18) Therefore, the y-intercept of this equation is y=-18.
180=11x+9x. 180 = 20x. 18=2x. 9=x.
9x+6 = 7x+18 9x-7x = 18-6 2x = 12 x = 6
4X - 32 + 5X + 50 = 180 gather like terms on the left 9X + 18 = 180 subtract 18 from each side 9X = 162 divide both sides by 9 X = 18 -------- check 4(18) - 32 + 5(18) + 50 = 180 72 - 32 + 90 + 50 = 180 40 + 90 + 50 = 180 180 = 180 checks
8x+9=9x-18+9 = 8x+9=9x-9 = 1x=0 (:
It is possible.
9x + 3y = -54 3y = -9x - 54 y = -(3x + 18) Therefore, the y-intercept of this equation is y=-18.
it equals 13X.
The slope is 0.
If x equals 10 and y equals 10, then 9x plus 8y equals 170.
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2x2 - 9x = 18 2x2 - 9x -18 = 0 (2x - 18)(x + 9) x= -9 and 9
9x + 9 = 135 9x = 126 x = 14