ANSWER IS 5
so
how many years ago=x
so
'in how many years ago (-x) was ethan 5 times older than son
40-x means ethan's age x years ago
12-x means son's age x years ago
so
ethan's age x years ago is 5 times as much as son's age 5 years ago
40-x=5(12-x)
distribute using a(b+c)=ab+ac
40-x=60-5x
add 5x
40+4x=60
subtract 40
4x=20
divide 4
x=5
ANSWER IS 5 years
Answer:
(c+b)/a
Step-by-step explanation:
ax=c+b
x=(c+b)/a
Answer:
![\displaystyle y = 9](https://tex.z-dn.net/?f=%5Cdisplaystyle%20y%20%3D%209)
Explanation:
Both ordered pairs have similar <em>y-coordinates</em>. In addition, any <em>straight</em><em> </em>line like this one, is considered a zero <em>rate of change</em> [zero <em>slope</em>], therefore you have your equation above.
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