Q: What is x if x plus 3x equals 40?

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10 - 3x = x - 2x + 40 10 - 3x = - x + 40 10 - 40 = 3x - x -30 = 2x -15 = x

3x + 11 = x + 3 2x = -8 x = -4

3x

X=2

If 3x + 5x = -8, what is x + 1? 3x + 5x = -8 8x = -8 x = -1 x + 1 = -1 + 1 = 0

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3x + 2x = 40 5x = 40 x = 8

10 - 3x = x - 2x + 40 10 - 3x = - x + 40 10 - 40 = 3x - x -30 = 2x -15 = x

4x + 10 + 3x = 40 - 3x 4x + 10 + 3x + 3x = 40 20x = 40 x = 2

5

x+30 = 3x-50 x-3x = -50-30 -2x = -80 x = 40

y=16 x= -4

2x+9 = 49-3x 2x+3x = 49-9 5x = 40 x = 8

x + y = 17 + 23 = 40

7x-4 = 3x+36Add 4, it cancels out.. So,7x = 3x+40Now subtract 3x from 7x..4x = 40..40 divided by 4 is 10So, X= 10

if 3x+5=x+19 then x=7

-3x + 40 = 38 Subtract 40 from both sides: -3x = -2 Multiply both sides by -1: 3x = 2 Divide both sides by 3: x = 2/3

X= 5