andy, juan, and stephanie have le.how many apples does andy have?

Question

andy, juan, and stephanie have a total of 70 apples. stephanie has 7 more than 3 times the number of andys apple. juan has 9 less than 5 times the number of andys apple.how many apples does andy have?

Answer 1

Let a = andy, j = juan, and s = Stephanie. here's what we know:

s = 3a + 7 (Steph as 7 more than 3 times Andy)

j = 5a - 9 (Juan has 9 less than 5 times Andy)

a + j + s = 70 (The three together collected 70 apples)

 

We have values for s and j, so we can put them into the equation:

a + (5a - 9) + (3a + 7) = 70

Combine like terms:

9a - 2 = 70

add 2 to both sides:

9a = 72

Divide by 9:

a = 8

 

Answer 2

s = 3a + 7

j = 5a - 9

 

a + 3a + 7 + 5a - 9 = 70

 

I bet you can solve for a from here!