Question

3×+5×+50-20
__________ = 6

9

5×-3×+14+16
_________ =7
8

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Answer 1

$\frac{3x + 5x + 50 - 20}{9} = 6 \\ 9 \times \frac{3x + 5x + 50 - 20}{9} = 9 \times 6 \\ 3x + 5x + 50 - 20 = 54 \\ 8x + 30 = 54 \\ 8x = 54 - 30 \\ 8x = 24 \\ x = \frac{24}{8} \\ x = 3$

$\frac{5x - 3x + 14 + 16}{8} = 7 \\ 8 \times \frac{5x - 3x + 14 + 16}{8} = 8 \times 7 \\ 5x - 3x + 14 + 16 = 56 \\ 2x + 30 = 56 \\ 2x = 56 - 30 \\ 2x = 26 \\ x = \frac{26}{2} \\ x = 13$