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Answer:
8.4
Explanation:
8 x .8= 6.4
40 - 6.4 = 33.6
33.6 / 4= 8.4
4 x 8.4= 33.6
33.6 + 6.4 = 40
Answer: 8.4
Rearrange the equation: 4x = 40 - 8y
Substitute 0.8 into the equation
— 4x = 40 - 8(0.8) = 40 - 6.4 = 33.6
Divide both sides by 4
— x = 8.4