Question

A number multiplied by three and a increased by five is equal to sing number multiplied by seven and decreased by 15 what is the number

Answer 1

Answer:

3x+5=7x-15

15+5=7x-3x

20=4x

x=20/4

x=5

Answer 2

Let the no. be x

$3x + 5 = 7x - 15 \\ 5 + 15 = 7x - 3x \\ 20 = 4x \\ 20 \div 4 = x \\ 5 = x \: ans..$