math help !!!!!!

Question

For each equation or inequality substitute 3 for every x . Determine if the equation or inequality results in a true number sentence or a false number sentence.

1. 3 + x = 18

1. 3x =18

1. 3x < 18

1. 5 + x 10

1. x - 1 5

1. x3=1

1. 15x40

1. 21x<7

Answer 1

first two false

3rd one is true

if you're writing exponents following x

then the last 3 are all false

the middle two

5+x^10 and

x-15 aren't true or false, they are not an equation or inequality