Question

Which equation has every number as a solution?

A. 4x = 4x + 1
C. 4(x+1)= 4x+1
B. 4x + 1 = 4x - 1
D. 4(x+1) = 4x + 4

Answer 1

D.

Explanation:

Lets look at equation D:

4(x + 1) = 4x + 4

4x + 4 = 4x + 4.

The left side is identical to the right so

you can put x equal to any number and this equation will be true.

Answer 2

the answer is D

Explanation:

the equation works with every number placed where the x is, for example:

4(5+1)= 4×5 + 4

4×6=20+4

24=24

but it also works with

4(11+1)= 4×11 + 4

4×12=44+4

48=48

and it also works with every possible number you can think!