What is 4x plus 6 plus 3 equals seventeen

The answer is 3.

the equation: 4x+6+3=17
                      4x+9=17
                      subtract 9 from both sides
                      4x=12
                      x=3

check by inserting 3 as x into the original equation

4*3+6+3=17

hope this helps!

4should be the last one n=4

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