Solve for x. will give brainlkest

1 answer:

7 0

Simplify both sides of the equation.
(−7.8)(x)+(−7.8)(6.5)=−25.74 −7.8x+−50.7=−25.74 -> −7.8x−50.7=−25.74
Add 50.7 to both sides.
−7.8x−50.7+50.7=−25.74+50.7 -> −7.8x = 24.96
Divide both sides by -7.8.
−7.8x /−7.8 = 24.96/−7.8
And as a decimal
X= −3.2

Hope this helped. (got taken off because I did the steps? oo well)

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ALGEBRAIC EXPRESSION 11. Subtract the sum of 13x – 4y + 7z and – 6z + 6x + 3y from the sum of 6x – 4y – 4z and 2x + 4y – 7. 12.

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Answer:

Explained below.

Step-by-step explanation:

(11)

Subtract the sum of (13x - 4y + 7z) and (- 6z + 6x + 3y) from the sum of (6x - 4y - 4z) and (2x + 4y - 7z).

$[(6x - 4y - 4z) +(2x + 4y - 7z)]-[(13x - 4y + 7z) + (- 6z + 6x + 3y) ]\\=[6x-4y-4z+2x+4y-7z]-[13x-4y+7z-6z+6x+3y]\\=6x-4y-4z+2x+4y-7z-13x+4y-7z+6z-6x-3y\\=(6x+2x-13x-6x)+(4y-4y+4y-3y)-(4z+7z+7z-6z)\\=-11x+y-12z$

Thus, the final expression is (-11x + y - 12z).

(12)

From the sum of (x² + 3y² - 6xy), (2x² - y² + 8xy), (y² + 8) and (x² - 3xy) subtract (-3x² + 4y² - xy + x - y + 3).

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