How to solve this equation
0.1r-1=0.65

r = 16.5

Step-by-step explanation:

Move the subtraction over to the over side first

0.1r - 1 = 0.65

It becomes addition on the right side

0.1r = 0.65 + 1

Move the multiplication over to the over side first

0.1r = 1.65

It becomes division on the right side

r = 1.65 / 0.1

r = 16.5

0.1r-1=0.65  (85% sure this is the answer

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.