6x - 4y
4X2+X3+3X+7Y+2X3 can only be simplified to 3X3+4X2+3X+7Y, because X3 and 2X3 are the only like terms.
7y+5=-9... 7y must equal -14 therefore y must be -2
(4, -7)
That depends what you want it to equal at the end.
6x - 4y
If you mean: 32-10x+7y = 0 then as a straight line equation it is 7y = 10x-32
4X2+X3+3X+7Y+2X3 can only be simplified to 3X3+4X2+3X+7Y, because X3 and 2X3 are the only like terms.
7y+5=-9... 7y must equal -14 therefore y must be -2
(4, -7)
18=39-7y minus 18 from both sides (0=21-7y) subtract 21 from both sides to get the variable and the number on opposite sides -21=-7y -21/-7y= ____ y= ___
8y - 38
That depends what you want it to equal at the end.
a + 7y
The commutative property applies to TWO numbers at a time, and it applies either to addition or to multiplication. So, for example:23 + 5x = 5x + 23
16+7y-8 = 7y+16-8 = 7y+8
This is a difference of two sqaures. 49y2 - z2 = (7y - z)(7y + z)