20q - 5r = 45
write down the value of 4q-r

9

Step-by-step explanation:

Given

20q - 5r = 45 ( divide all 3 terms by 5 )

4q - r = 9

the answer is 1030 it's very simple math.

30.5*10=350$

you have to multiply the number without the decimal point then add it later but if its tenn u must move the place value of the decimal point 1 to the right.