5m + 6m - 18 = 60 combine like terms
11m - 18 = 60 subtract from both sides
11m = 78 divide 11
m = 7. 0909.
round to. = 7.1
5m+6+m-18=60Thats a linear equation in m . Theres only one number that m can be
that makes the equation true. The assignment is usually to find out what
that number is.
Before we get carried away and confuse ourselves, lets do some work
on the left side, and try to make it simpler.
Do you see that 5m and that +m ? We can combine them, and write 6m .
Do you see that +6 and that -18 ? We can combine those, and write -12 .
Now the equation is much simpler:
6m - 12 = 60
Add 12 to each side:
6m = 72
Divide each side by 6 :
m = 12