Answer:
To add or subtract some rational numbers, you have to change the rational numbers so they have a common denominator. When you have a common denominator, you can then go on with the addition or subtraction on the numerator part.
12x + 6y = 120
-24x -6y =-180
-12x = -60
x = 5
4(5) + y = 30
20 + y = 30
y = 10
(5, 10)
Answer: 57.5
Step-by-step explanation: The first thing you need to know about the order of operations is that multiplication and division come before addition and subtraction.
So in this problem, we are going to divide before we add.
Since 30 divided by 4 is 7.5, our next step will read 50 + 7.5 and 50 + 7.5 simplifies to 14.
Answer:
11x + 3
Step-by-step explanation:
3/5(10x+5)5
6x+3+5x
6x+5x+3
11x+3
Answer:
B
Step-by-step explanation: