Question

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Answer 1

$1)3x - 2 = x + 6 \\ 3x - x = 6 + 2 \\ 2x = 8 \\ x = \frac{8}{2} \\ x = 4$

$2)2x + 7 = 19 \\ 2x = 19 - 7 \\ 2x = 12 \\ x = \frac{12}{2} \\ x = 6$

$3)5x - 20 = 50 \\ 5x = 50 + 20 \\ 5x = 70 \\ x = \frac{70}{5} \\ x = 14$

$4) \frac{x - 2}{3} = 3 \\ 3( \frac{x - 2}{3} ) = 3 \times 3 \\ x - 2 = 9 \\ x = 9 + 2 \\ x = 11$

$5)10x + 14 - 4 = 100 \\ 10x + 10 = 100 \\ 10x = 100 - 10 \\ 10x = 90 \\ x = \frac{90}{10} \\ x = 9$

$6)5x = 45 - 3x - 5 \\ 5x = 40 - 3x \\ 5x + 3x = 40 \\ 8x = 40 \\ x = \frac{40}{8} \\ x = 5$

$7)6x + 3 = 21 \\ 6x = 21 - 3 \\ 6x = 18 \\ x = \frac{18}{6} \\ x = 3$

$8)7x - 1 = 4x + 20 \\ 7x - 4x = 20 + 1 \\ 3x = 21 \\ x = \frac{21}{3} \\ x = 7$

$9) \frac{x}{3} - \frac{2x}{9} = 11 \\ 9( \frac{x}{3} - \frac{2x}{9} ) = 9 \times 11 \\ 3x - 2x = 99 \\ x = 99$