Question

x/4+x/3=7
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Answer 1

Answer:

$\frac{x}{4} + \frac{x}{3} = 7 \\ \\ = \frac{3x + 4x}{12} = 7 \\ \\ = \frac{7x}{12} = 7 \\ \\ = 7x = 7 \times 12 \\ \\ = 7x = 84 \\ \\ = x = \frac{84}{7} \\ \\ = x = 12$

Answer 2

Answer:

$\frac{x}{4} + \frac{x}{3} = 7 \\ \\ = lcm = 4 \times 3 = 12 \\ \\ = \frac{3x + 4x}{12} = 7 \\ \\ = 7x = 7 \times 12 \\ \\ = 7x = 84 \\ \\ = x = \frac{84}{7} \\ \\ = x = 12$