Solve the Equation: Discover X in 7/8x = 2/5

Question

Solve for X:

78x=25 \frac{7}{8}x=\frac{2}{5}

Video Solution

Solution Steps

00:00 Solve
00:03 We want to isolate the unknown X
00:07 Let's arrange the equation so that one side has only the unknown X
00:11 Multiply by the denominator to eliminate the fraction
00:18 Simplify what we can
00:29 Let's isolate the unknown X
00:47 Simplify what we can
00:54 Division by a fraction is like multiplication by its reciprocal
01:02 Calculate the products
01:06 And this is the solution to the question

Step-by-Step Solution

To solve for x x in the equation 78x=25 \frac{7}{8}x = \frac{2}{5} , we will follow these steps:

  • Multiply both sides of the equation by the reciprocal of 78\frac{7}{8}, which is 87\frac{8}{7}.
  • Simplify the resulting expression to find the value of x x .

Let's work through these steps:

First, multiply both sides by 87\frac{8}{7} to isolate x x on the left side.

87×78x=87×25 \frac{8}{7} \times \frac{7}{8}x = \frac{8}{7} \times \frac{2}{5}

This simplifies to:

x=87×25 x = \frac{8}{7} \times \frac{2}{5}

Now, perform the multiplication of the fractions:

x=8×27×5=1635 x = \frac{8 \times 2}{7 \times 5} = \frac{16}{35}

Thus, the value of x x is 1635\frac{16}{35}.

Answer

1635 \frac{16}{35}