Question

Find the value of 4x +3 given that 7x+9=2.

Answer 1

The answer is -1

Explanation:
7x+9=2

subtract 9 on both sides making the new equation 7x=-7

then divide 7 on both sides to get the x by itself leaving you with x=-1

next plug in -1 into x for 4x+3

4(-1)+3=-1

Answer 2

-1

Explanation:

First 7x+9=2

We solve for x in this equation

7x=2-9

7x= -7

x= -7/7= -1

Then x= -1, we substitute for x in this equation 4x+3

4(-1)+3= -4+3= -1