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Q: What is 5x plus 5 plus 7x equals 47 plus 5x?

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7x = 5+5x 7x-5x = 5 2x = 5 x = 2.5

(1) 5x+y=-12 (2) 7x-3y=-30 From (1) one gets y = -12-5x Put into (2) 7x-3y = 7x -3 (-12-5x) = 7x + 36 +15 x = 22x +36=-30 22x = -30-36 = -66 so x = -3 and y=-12-5x = -12-5x-3= 3 The solution is (-3,3)

5x+32+7x+8=180. By the laws of commutativity we can thus say that 12x+40=180. Subtracting 40 we get 12x=140. Divide by 12 and you get x=(do it yourself) This has nothing to do with calculus by the way.

5x - 3y -7x + 2y +3x = (5-7+3)x + (-3+2)y = x - y

5x-8 + 7x 12x-8 12x = 8 x = 8/12 x= 2/3

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7x = 5+5x 7x-5x = 5 2x = 5 x = 2.5

7x-5x=8 2x=8 x=4

It is: 12x

7x + 8 = 5x + 327x = 5x + 242x = 24x = 12hope this helps

x=12

x = -5

5x + 17 = 7x - 123 123 + 17 = 7x - 5x 140 = 2x x = 140 ÷ 2 x = 70

79

The 7x and the 5x are like terms. This means that you can add them up. Think about it, 7 x's plus 5x's equals 12x's. From there, you can divide 12 from both sides of the equation, and you will get that x = 2.

548

142

(4, -2)

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