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stiv31 [10]
3 years ago
8

Answer quick for brainliest.

Mathematics
2 answers:
Ilya [14]3 years ago
8 0

Answer:

4) x = -11    5) x = 4     6) x = -5    7) x = -20

Step-by-step explanation:

4)

Subtract 7 from both sides.

x+7-7 = -4-7

x = -11

5)

Add 5 to each side.

x-5+5 = -1+5

x = 4

6)

Add 7 to each side.

-7 + 7+x = -12+7

x = -5

7)

Subtract 6 from each side.

6-6+x = -14-6

x = -20

olga2289 [7]3 years ago
5 0

Answer:

x=-11

x=4

x=-5

x=-20

Step-by-step explanation:

jsj

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<h3>What is differentiation?</h3>

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\begin{aligned} \dfrac{\mathrm{d} }{\mathrm{d} d}P(d) &= \dfrac{\mathrm{d} }{\mathrm{d} d}(- 4d + 40) (d - 40) \\\\\dfrac{\mathrm{d} }{\mathrm{d} d}P(d) &= \dfrac{\mathrm{d} }{\mathrm{d} d}(-8d + 200) \\\\\dfrac{\mathrm{d} }{\mathrm{d} d}P(d) &= -8\\\\ \dfrac{\mathrm{d} }{\mathrm{d} d}P(d) & < 0\end{aligned}

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More about the differentiation link is given below.

brainly.com/question/24062595

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