Question

How do you solve `x+ x + 13.50= 25.50`?

Answer 1

First, make the decimals as brackets, because we are not calculators
`x+x+1350/100=2550/100`
Solve the variables and transfer the fraction in LHS
`2x=2550/1000-1350/1000`
Solve
`2x=1200/1000`
That is equal to
`2x=12.00`
Transfer 2 to RHS
`x=12/2`
Solve
`x=6`