3
algebra

Solve: 0.2(x−10)+0.5x=0.3(2x+5)0.2(x - 10) + 0.5x = 0.3(2x + 5)

A

15

B

5

C

35

D

25

Correct Answer: C

Choice Bhoice C is the correct answer.

  1. Distribute: 0.2x−2+0.5x=0.6x+1.50.2x - 2 + 0.5x = 0.6x + 1.5
  2. Combine: 0.7x−2=0.6x+1.50.7x - 2 = 0.6x + 1.5
  3. Subtract 0.6x: 0.1x−2=1.50.1x - 2 = 1.5
  4. Add 2: 0.1x=3.50.1x = 3.5
  5. Divide by 0.1: x=35x = 35

Choice Bhoice A is incorrect because calculation error.

Choice Bhoice D is incorrect because calculation error.

Choice Bhoice D is incorrect because calculation error.

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Linear Functions Set 40