Answer:
1/10
Step-by-step explanation:
first you find the common denominator.
multiply 1/2 by 5 and 2/5 by 2
now you have 5/10-4/10
now its easy and the answer is 1/10
Answer:
2(4a+b-2)
Step-by-step explanation:
All you need to do is factor out 2 from the expression. (sorry if this is wrong)
A dfc is equal to bfc and that is a fact
7x+5y=-24 (1)
4x+y=42 (2)
multiply equation (2) by 5 to get
20x+5y=210 (3)
then calculate (3)-(2) which gives you
13x=234 hence x=18
then substitute for x in either equation to get y=-30
