Question

The second of two numbers is 10 more than 3 times first their sum is 70 find the numbers

Answer 1

Let the first number be represented by x and the second 10+3x
x+3x+10=70                                           10+3x=10+3(15)=10+45=55
4x+10=70                                            the two numbers are 15 and 55
4x+10-10=70-10
4x=60
4x/4=60/4
x=15