Question

6. Solve the following equations and check the results.
(a) 5 (2x - 3) - 3 (3x - 7) = 5

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Answer 1

Answer:

$5(2x - 3) - 3(3x - 7) = 5 \\ 10x - 15 - 9x + 21 = 5 \\ 10x - 9x + 21 = 5 + 15 \\ 10x - 9x + 21 = 20 \\ 10x - 9x = 20 - 21 \\ 10x - 9x = - 1 \\ x = - 1 \\ checking : - \\ 5(2x - 3) - 3(3x - 7) \\ 10x - 15 - 9x + 21 \\ x = - 1 \\ (10 \times - 1) - 15 + ( - 9 \times - 1) + 21 \\ - 10 - 15 + 9 + 21 \\ - 25 + 30 = 5$