Ok so 6x - 3y = -21
And 4x = 3y - 9
From the second equation, 4x - 3y = -9
So if you subtract the second from the first,
(6x-3y) - (4x-3y) = -21 - (-9)
So 2x = -12
x = -6
Now we know x=-6, and you can sub it back into any equation:
6(-6) -3y = -21
-36 - 3y = -21
-3y = 15
y = -5
So x=-6 and y=-5
Hope this helps
Answer:
-12 & -18
Step-by-step explanation:
1st we write out 'twice a number z'.2zNow we divide 8 by 2z and the answer is:8 / 2z
Answer:
The solution to the equation is:
- <u>x = 2.5</u> or <u>x = 5/2</u>
Step-by-step explanation:
To find the solution to the equation, you only must operate the equation until you clear the x variable, with the next steps:
And we solve:
- 4x + 28 = 38 (we multiply 4 by x and 7)
- 4x = 38 - 28 (we pass the +28 to subtract to the right side of the equality and operate)
- x = 10 / 4 (we pass the 4 that is multiplying to divide to the right side of the equality)
- <u>x = 2.5</u> (we divide)
As you can see, <u><em>the solution of the equation is </em></u><u><em>x = 2.5</em></u><u><em> or </em></u><u><em>x = 5/2</em></u>
Answer:
n ≤ -7
Step-by-step explanation:
Sum of 15 and n is less than or equal to 8.
15 + n ≤ 8
Collect like terms
n ≤ 8 – 15
n ≤ -7
