Answer: 1 3/10a+19
Step-by-step explanation:
Ok so first you have to open the parenthesis. Since the sign to the left of both the parenthesis is positive we can just normally open the parenthesis .
We get: 1/2a+12+4/5a+7
We need to convert the denominators of 1/2a and 4/5a so we can add them together
1/2a=5/10a
4/5a=8/10a
Now we can add the a variables together.
5/10a+12+8/10a+7=
13/10a+12+7
Then add 12 and 7 together:
13/10a+19 = 1 3/10a+19
Keep in mind: If the sign to the left of the leftmost parenthesis is negative then the sign inside the parenthesis is negative.
For example when opening this parenthesis: (2+3/x<u>)-(2+3x)</u> the sign is negative so the opening parenthesis is -2-3x.
1) 3x+y+z=4
2) 2x+2y+3z=3
3) x+3y+2z = 5
1)*2 6x + 2y + 2z = 8
2) 2x + 2y +3z = 3
- __________________
4x - z = 5
2)*3 6x + 6y + 9z = 9
3)*2 2x + 6y + 4z = 10
- __________________
<span>4x+5z =-1
</span>
4x+5z = -1
4x - z =5
- ________
6z = -6
<u>z = -1
</u><u /><u>
</u>If z=-1,
4x -(-1) =5
4x = 5-1
x = 4/4
<u>x=1</u>
3x+y+z=4
3(1)+y+(-1)=4
3+y-1=4
<u>y=2
So z=-1, x=1, y=2</u>
The answer is I don’t really know how to explain it but trust me it’s B: 8.1
Answer:
-14 or -2
Step-by-step explanation:
-8+-6= -14
-8+6 = -2
