How do you write 4x plus 4y equals 40 or how do you solve it? You would write it 4x+4y=40 you would solve it for y by subtracting 4x from both sides 4y=40-4x then divide all of that by 4y=40-4x/4 that's if you were graphing i have no idea what you're asking hope that helps if it's not too late.
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4x+8y=-24
f(x) = 2x2 + 4x - 7
2
4x-14
The answer to the problem of 13 equals -4x plus 9 is x equals -1.