3x+x+2/5=7 - solution

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Solution for 3x+x+2/5=7 equation:

x in (-oo:+oo)

3*x+x+2/5 = 7 // - 7

3*x+x+2/5-7 = 0

4*x-33/5 = 0 // + 33/5

4*x = 33/5 // : 4

x = 33/5/4

x = 33/20

x = 33/20

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