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7y+5=-9... 7y must equal -14 therefore y must be -2
3y=7y+24.4 First, try to get all the y-terms on the same side of the equation. Easily done here by subtracting 7y from both sides 3y-7y=7y-7y+24.4 -4y=24.4 Now divide by -4 -4y/-4=24.4/-4 y=-6.1
That depends what you want it to equal at the end.
OK:7y-6=87y+6-6=8+67y = 14y = 2.Y is equal to 2. Hope this helps!
4X2+X3+3X+7Y+2X3 can only be simplified to 3X3+4X2+3X+7Y, because X3 and 2X3 are the only like terms.