Question

What expressions are equivalent to 4x?

A: 3x +x
B: 2x + 2
C: 4 + x
D:8x - 4
E: x + x + x + x

Answer 1

A and E .
A. 3x + x ( X here has default 1 but we don't write it in algebra so we can add terms alike like this one 3x+1x= 4x)

E. x+x+x+x= 4x ( we treat this the same way as adding four 1x's to get 4x)

Answer 2

A. 3x + x = 4x

E. x + x + x + x = 4x

A and E are the correct expressions.