Show your work 20.5=15.5+(-3.6x)+1.8x a. -20 b. -2.7 c. 6.6 d. 20

Starting with the given  20.5=15.5+(-3.6x)+1.8x, rewrite "+(-3.6x)" as "-3.6x:"

20.5=15.5-3.6x+1.8x

Next, combine like terms:  20.5-15.5 = -3.6x+1.8x, or

                                                     5      =  -1.8x

Dividing both sides by -1.8 yields  -2.78 = x, or x = -7/9

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step-by-step explanation: the answer for wha if rt is 10 centimeters long, and wha is st? it’s 6