Question

If the expression is 3x+1 is equal to -7 for the some value of x, Then what is the value of the expression 6x+5 for the same value of X? Show the work that leads to your solution

Answer 1

remember, you can do anything to an equation as long as you do it to both sides
3x+1=-7
minus 1 both sides
3x+1-1=-7-1
3x+0=-8
3x=-8
divide both sides by 3

`(3x)/(3)=(-8)/(3)`

`(3)/(3)x=(-8)/(3)`

`1x=(-8)/(3)`

`x=(-8)/(3)`

ok for 6x+5

6x+5

`6((-8)/(3))+5=`

`(-48)/(3)+5=`

`-16+5=`

`-11`






`x=(-8)/(3)` and
`6x+5=-11 \space\ for \space\ x=(-8)/(3)`

Answer 2

3x+1=-7
3x = -8 subtract 1 from both sides to separate the x
X= -8/3 divide both sides by 3 to find the value of x


6(-8/3) + 5 replace x with the value of x that you found in the other equation
16 + 5 multiply 6 * (-8/3)
21 add 16+5