vuvuong003
vuvuong003 vuvuong003
  • 02-11-2015
  • Mathematics
contestada

John's age is 4 more than 3 time Mike's age. If their sum is 20, how old are Mike and John?

Respuesta :

Neuron
Neuron Neuron
  • 02-11-2015
Let me help you with this :)

John = x 
Mike = y

x = 4 + 3y (4 more than 3 times)

x + y = 20 (we put the x above into this equation)

4 + 3y + y = 20 
4y = 16 (we transfers the 4 on the left side to the right side and subtract it from the 20)
y = 4 (the answer is 4)

we use this for the equation:

x = 4 +3*4
x = 16

John is 16 years old and Mike is 4 years old :)

Answer Link

Otras preguntas

simplify. 5^-1(3^-2) (1 point)
The era in which early humans made tools is called the _____.
Pizza Perfection sold 93 pizzas on Monday, 67 pizzas on Tuesday, 78 pizzas on Wednesday, 44 pizzas on Thursday, and 123 pizzas on Friday. On average, how many p
divide 24 by 6 less than 8
Why is it difficult to adjust to new things in life ?give examples please
Most of the time, combustion reactions occur when hydrocarbons react with what element?
A specialist who diagnoses, treats, and prevents disorders and diseases of children is a/an A. podiatrist. B. oncologist. C. pediatrician. D. obstetrician.
write a word phrase for each algebraic expression 25-0.6x
WHICH OF THE FOLLOWING IS NOT A POTENTIAL BENEFIT OF USING MORE NUCLEAR ENERGY?
A jar lid has a diameter of 42 millimeters.What is the circumference of the lid?