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OR

 If 2x + 13 = 17, find the value of 3x + 1

2x=4

times both sides by 1.5

3x=6

3x+1=6+1=7

The equation is 2x+13=17, find x:

Substract 13 on both sides:   2x=4

Divide by 2 on both sides:       x=2

(Check: if x=2, then 2x2+13=17)

Subsituting x=2 into the equation 3x+1 gives:

3x2+1=7

the value needed for this equation is what

All the informations that you need are provided in the first answer, x=2 so the value of the equation 3x+1 is 7.