Question

when20 subtracted from a no. and then multiplied by 7 gives 142​

Answer 1

Step-by-step explanation:

$(x - 20) \times 7 = 142$

$x - 20 = \frac{142}{7}$

$x = \frac{142}{7} + \frac{20 \times 7}{1 \times 7}$

$x = \frac{142 + 140}{7}$

$x = \frac{282}{7}$

check:-

$( \frac{282}{7} - 20) \times 7 = 142$

$( \frac{282}{7} - \frac{20 \times 7}{1 \times 7} ) \times 7$

$\frac{282 - 140}{7} \times 7$

$\frac{142}{7} \times 7 = 142$

hence LHS=RHS