Don’t understand, need help

30

Step-by-step explanation:

30 x 3 90

30 x 2 60

30 x 1 30

90+60+30

answer: 48

just remember to use pemdas:

parentheses

expressions

multiplication

division

addition

subtraction

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!