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2 years ago

-3x + 7 = -2 solve for x

Mathematics

2 answers:

Yuliya22 [10]2 years ago

5 0

-3x+7= -2

Move +7 to the other side. Sign changes from +7 to -7.

-3x+7-7= -2-7

-3x= -9

Divide by -3 for both sides

-3x/-3= -9/-3

x= 3

answer : x= 3

zavuch27 [327]2 years ago

3 0

Answer:

Step-by-step explanation:

subtract 7 from both sides. divide both sides by -3

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Answer:

FIRST EXPRESSION:

- If $b=-3$ , the value of $4b(b+1)$ is $24$

- If $b=-2$ , the value of $4b(b+1)$ is $8$

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SECOND EXPRESSION:

- If $b=-3$ , the value of $(2b+7)(2b-8))$ is $-14$

- If $b=-2$ , the value of $(2b+7)(2b-8))$ is $-36$

- If $b=10$ , the value of $(2b+7)(2b-8))$ is $324$

Yes, for any value of "b" the value of the first expression is greater than the value of the second expression.

Step-by-step explanation:

Substitute the given values of "b" into each expression and evaluate.

- For the first expression $4b(b+1)$ , you get:

If $b=-3$ → $4(-3)(-3+1)=24$

If $b=-2$ → $4(-2)(-2+1)=8$

If $b=10$ → $4(10)(10+1)=440$

- For the second expression $(2b+7)(2b-8))$ , you get:

If $b=-3$ → $(2(-3)+7)(2(-3)-8)=-14$

If $b=-2$ → $(2(-2)+7)(2(-2)-8)=-36$

If $b=10$ → $(2(10)+7)(2(10)-8)=324$

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