Answer:
13/4
Step-by-step explanation:
the method is pretty easy.we find the LCM of the denominator and then see in how many times it comes in the denominator we then multiply the numerator of the given denominator by its multiple of the LCM .Lemme show u how:
LCM of 2 and 4 is 2
hence,(3*1/4*1)+(5*2/2*2)
=3/4+10/4
now the denominators are common so we can add them up it becomes:
=10+3/4
=<u>1</u><u>3</u><u>/</u><u>4</u>
Q = 7m + 3n
R = 11 - 2m
S = n + 5
T = -m - 3n + 8
simplify Q + S - T
7m + 3n + n + 5 - (-m - 3n + 8) =
7m + 4n + 5 + m + 3n - 8
8m + 7n - 3 <====
