Best Answer

Subtract 5 from each side: 16 = 5x + 3x ie 16 = 8x

Divide each side by 8: 2 = x

21 = 5x + 3x + 5

21 - 5 = 8x

16 = 8x

16/2 = x

2 = x

x = 2

Check:

21 = 5(2) + 3(2) + 5

21 = 10 + 6 + 5

21 = 21

Q: 21 equals 5x plus 3x plus 5?

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5x+7=3x-21 -7= -7 5x=3x-14 -3x=-3x 2x=-14 2x/2x=2x/-14 x=-7 The Answer Is -7 -

5x+3 = 3x+11 5x-3x = 11-3 2x = 8 x = 4

5x + 5 = 8 -3x 5x = 3 -3x 8x = 3 x = 0.375

5k

3x+7=5x-13 ----> 3x-5x=-13-7 ----> -2x=-6 -----> x=3

Related questions

5x+7=3x-21 -7= -7 5x=3x-14 -3x=-3x 2x=-14 2x/2x=2x/-14 x=-7 The Answer Is -7 -

2x+3x = 5x

5x = 3x+1000+0 5x-3x = 1000 2x = 1000 x = 500

5x - 4 = 3x + 6 5x - 3x = 6 + 4 2x = 10 x = 5

5x+3 = 3x+11 5x-3x = 11-3 2x = 8 x = 4

3x+11+5x=75(add 5x and 3x) 8x+11=75(-11) 8x=64(/ 8) x=8(ANSWER)

5x + 5 = 8 -3x 5x = 3 -3x 8x = 3 x = 0.375

5k

3x+7=5x-13 ----> 3x-5x=-13-7 ----> -2x=-6 -----> x=3

32-5x=3x+8 32-5x-8=3x+8-8 24-5x=3x 24-5x+5x=3x+5x 24=8x x=24/8=3

No.

5x+2 = 3x-6 5x-3x = -6-2 2x = -8 x = -4