Question

What would the first step be in solving the equation 4/7x = 21

Answer 1

❄ Hi there,

the first step in solving this inequality is

• multiplying (both sides) by 7

$\sf{\dfrac{4}{7}x\times7=21\times7}$. Look what happens on the left side!

$\sf{4x=147}$

Multiplying both sides of an equation, or inequality, by the fraction's denominator, is a nice little trick when you need to get rid of fractions to solve in terms of a variable.

Finish solving for x by dividing both sides by 4 –

$\sf{x=\dfrac{147}{4}}$

❄

Answer 2

Step-by-step explanation:

$\frac{4}{7x} = 21$

$7x = 21 \times 4$

$7x = 84$

$x = \frac{84}{7}$

$x = 12..$