SOLUTION: the sum of two numbers 89. Adding four times the first number to the second number gives 155. what equation can be used to solve this problem?

Question 972954: the sum of two numbers 89. Adding four times the first number to the second number gives 155. what equation can be used to solve this problem?
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!

let's numbers be and
if the sum of two numbers is , then we have
.........eq.1

if adding four times the first number (means ) to the second number gives , we have
.........eq.2
now we have system to solve:
.........eq.1
.........eq.2
---------------------------subtract eq.1 from eq.2

now go to eq.1, substitute for and solve for
.........eq.1

so, your numbers are and

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