Question

solve by linear equation. 5 ( x - 1) + 2 ( x - 1) = 7​

Answer 1

Answer:

$5(x - 1) + 2(x - 1) = 7 \\ 5x - 5 + 2x - 2 = 7 \\ 5x + 2x - 5 - 2 = 7 \\ 7x - 7 = 7 \\ 7x = 7 + 7 \\ 7x = 14 \\ x = \frac{14}{7} \\ x = 2$

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Answer 2

5 ( x - 1 ) + 2 ( x - 1 ) = 7

5x - 5 + 2 ( x - 1 ) = 7

5x - 5 + 2x - 2 = 7

7x - 5 - 2 = 7

7x - 7 = 7

7x = 7 + 7

7x = 14

x = 14 / 7

x = 2