Belinda kept records of her gasoline purchases for one month. She bought 8 5/10 gallons, 9 3/10 gallons, 8 gallons, and 77/10 gallons. How many gallons did she buy that month?

5/10 + 8 = 5/10 + 80/10 = 85/10

3/10 +9 = 3/10 + 90/10 = 93/10

80/10

77/10

Add everything up

85+93+80+77 = 335

335/10 = 33 5/10 = 33 1/2

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step-by-step explanation:

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.