Solve for x in the linear equation: 5x - 7 = 2x + 8.
Answer and explanation
Correct answer: D. 5
- Step 1: Subtract 2x from both sides: 5x - 2x - 7 = 8, which simplifies to 3x - 7 = 8. Step 2. Add 7 to both sides: 3x = 15. Divide by 3: x = 5. Answer: 5. Why not the others: 3 gives 5(3)-7=8 != 14; 4 gives 13 != 16; 6 gives 23 != 20.
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