Question

Select all of the equations for which x=9 is a solution. x2=187x=4220−x11=145−2x=273(1+x)=30

Answer 1

Let us solve for x in each of the equations given to confirm which of them gives the solution x = 9

For x² = 18

x = √ 18

x = 4.24

That is, x ≠ 9

For 7x = 42

Divide both sides by 7

7x / 7 = 42/7

x = 6

That is, x ≠ 9