Question

Solve: 4+1.8x = 8 (1+0.1x)
A. There are infinitely many solutions.
B. x = -3
C. x = -4
D. x = 4

Answer 1

$4+1.8x=8+0.8x\\\\4+1.0x=8\\\\1.0x=4\\\\x=4$

the answer is x = 4.