Question

5.
m 1
Solve the following equations by transposing
method and verify your answer
3x/7-4x/21=5
​

Answer 1

Answer:

$x = 21$

Step-by-step explanation:

$\frac{3x}{7} - \frac{4x}{21} = 5 \\ \frac{9x - 4x}{21} = 5 \\ \frac{5x}{21} = 5 \\ 5x = 5 \times 21 \\ x = \frac{5 \times 21}{5} \\ x = 21 \\ Verification \\ \frac{3x}{7} - \frac{4x}{21} = 5 \\ \frac{3(21)}{7} - \frac{4(21)}{21} = 5 \\ 3(3) - 4(1) = 5 \\ 9 - 4 = 5 \\ 5 = 5 \\ LHS = RHS \\ Hence \: verified$