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Question 629439: what number is three more than twice the other number if the sum of the two numbers is 21
Answer by algebrahouse.com(1659)   (Show Source):
You can put this solution on YOUR website! "what number is three more than twice the other number if the sum of the two numbers is 21"
x = one number
2x + 3 = other number {one number is three more than twice the other}
x + 2x + 3 = 21 {their sum is 21}
3x + 3 = 21 {combined like terms}
3x = 18 {subtracted 3 from each side}
x = 6 {divided each side by 3}
2x + 3 {other number}
= 2(6) + 3 {substituted 6, in for x, into 2x + 3}
= 12 + 3 {multiplied}
= 15 {added}
one number is 6
other number is 15
For more help from me, visit: www.algebrahouse.com
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