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Q: 3x plus 2x equals 40

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

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

y=16 x= -4

7. 8x-40=2x+2 4x-20=1x+1 3x-21=0 3x=21 therefore x=7

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

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

x + 3x = 40 4x = 40 x = 10.

3x + 2x - 20 = 180 5x - 20 = 180 Add 20 to both sides: 5x = 200 Divide both sides by 5: x = 40

5

x^2+2x+40 = x^2-x+190Subtract x^2 from both sides2x+40 = -x+190Add x to both sides3x + 40 = 190Subtract 40 from each side3x = 150Divide both sides by 3x = 50

Add the two equations you get 5y = 60 so y = 12 and x = 2

To solve for x, set up the equation: 2x +2x = 40 (then simplify) 4x = 40 (then divide both sides of the equation by 4) x = 10 (this is the answer)

-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

-4x2 + 6x + 40 = 0 ∴ -2x2 + 3x + 20 = 0 ∴ -2x2 - 8x + 5x + 20 = 0 ∴ -2x(x + 4) + 5(x + 4) = 0 ∴ (5 - 2x)(x + 4) = 0 ∴ x ∈ {5/2, -4}

I have no idea because this is not an expresion. If you mean 2x+10=3x+50, this is how you do it. 1. 2x+10=3x+50 2. 10=x+50 3. -40=x 4. x=-40

You can find the value of x by equating the two equations.x^2+2x+40 = x^2-x +190Firstly, subtract x^2 from both sides2x+40 = -x + 190Now subtract 40 from each side2x = -x + 150Now add x to each side3x = 150Divide by 3x = 50

Presumably this is an equation asking you to find the value of x 10-3x = 2x-8x+40 Arrange all like terms on the left and right hand sides remembering to change signs: 8x-3x-2x = 40-10 Simplified: 3x = 30 Divide both sides by 3 for the solution: x = 10 Check that answer is correct by substituting 10 for x in the original equation.

x=7 look at the bottom for the reason: First, when a number and a variable are placed next to each other it means to multiply the 2. (example- what is 3x if x=7 ? Well, 3x7=21 so, 3x=21) so, 5x + 2x + 3x + 10x = 140 20x = 140 40/20 = 7 so, (5x7) + (2x7) + (3x7) + (10x7) = 140 so, 35 + 14 + 21 + 70 = 140

7x-40 = -3x Add 40 and add 3x to both sides:- 7x-40+40+3x = 3x-3x+40 10x = 40 Divide both sides by 10:- x = 4

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

x=20

2x+17=6x-23 23+17=6x-2x 40=4x x=40 / 4 therefore x=10

6x-52 = 4x+40 6x-4x = 40+52 2x = 92 Answer: x = 46

3x-5=40x+3 Subtract 3x-5 from each side 0=37x+8 -8=37x x= -8/37

2X + 50 = 5X - 10 subtract 2X from each side 50 = 3X - 10 add 10 to each side 60 = 3X divide each side by 3 20 = X check 2(20) + 50 = 5(20) - 10 40 + 50 = 100 - 10 90 = 90 checks