If you mean: -3 times 7 times -21 then the answers is plus 441
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y= -4x-7 y=3x 3x= -4x-7 3x+4x=7 7x=7 x=1
6x-7 = 3x+5 6x = 3x+12 (subtracting -7) 3x=12 (subtracting 3x) x=4 (dividing by 3)
-2X ? 14- 3x - 7 I am assuming you left something out so I put the question mark in. If it is -2X + 14 - 3x - 7 -Combine like terms -2x - 3x + 14 - 7 -5x + 7 DONE If it is -2X - 14 - 3x - 7 -Combine like terms -2X - 3X - 14 - 7 -5X - 21 DONE
y-3x+6y=12 7y=3x+12 y=3x/7 +12/7