(5a+7b)-(3a+2b)
When there is a in front of an expression in parentheses, change the sign of each term in the expression
5a+7b-3a-2b
collect the like terms
5a-3a= 2a
7b-2b= 5b
answer: 2a+5b
hope this helps! :)
Answer:
40
Step-by-step explanation:
9a + 9b + 9c = 5
We want 72a
72a/9a = 8 so multiply the first equation by 8
8(9a + 9b + 9c) = 5*8
72a +72b +72c = 40
Solution for P=100a/t equation:
x in (-oo:+oo)
P = (100*a)/t // - (100*a)/t
P-((100*a)/t) = 0
P-100*a*t^-1 = 0
P-100*a*t^-1 = 0
x należy do R
x in (-oo:+oo)