Question 1158681
Let Bono's dad's age be x. Bono's age is {{{(1/2)*x-5}}}. We have {{{x+(1/2)*x-5=70}}}. Simplifying, we get {{{(3/2)*x-5=70}}}. Adding 5 on both sides, we get {{{(3/2)*x=75}}}. Multiplying both sides by 2, we get {{{3x=150}}}. Dividing both sides by 3, we get {{{highlight(highlight_green(highlight(x=50)))}}}. So the dad's age is 50. Bono's age is {{{(1/2)*50-5=25-5=highlight(highlight_green(highlight(20)))}}}.