Question

a number is 2/5times another number if their sum is 70 find the number

Answer 1

one no is given then let the other number be

X then



$\frac{x}{1} + \frac{2x}{5} = 70 \\ \\ \frac{5x + 2x}{5} \\ \\ = \frac{7x}{5} = \frac{70}{1} \\ \\ cross \: multiplication \\ \\ 7x = 350 \\ \\ x = \frac{350}{7} \\ \\ x = 50$



hence the other no. is 50