-3(x-2)=9(x+8) how do I solve for x?

Mathematics

2 answers:

choli [55]3 years ago

6 0

Answer:x=-5.5

Step-by-step explanation:

schepotkina [342]3 years ago

5 0

Answer:

26=x

Step-by-step explanation:

well you need to do the distributive property.

-3(x-2) = -6x+6

9(x+8) = 9x+72

-6x+6=9x+72

now you subtract -6x from -6x and 9x

and add 72 to 6

-6x +6 =9x + 72

-6x + 72 -6x -72

78=3x

divide them both by 3

26=x

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alukav5142 [94]

I think that the answer is A.

3 0

3 years ago

Hey! Can someone check my answers?

Andrew [12]

The greatest common factor is the biggest number taken from the values.

Q1. The answer is <span>A. 5y^6
</span>
$20 y^{9} +5 y^{6}= 4*5 y^{9}+5 y^{6}$
Since $x^{a}* x^{b} =x^{a+b}$ , then $x^{9}= x^{3}* x^{6}$

Back to our expression:
$4*5 y^{9}+5 y^{6}=4*5 y^{3}*y^{6}+5 y^{6}=4 y^{3}*5y ^{6}+ 5y ^{6}*1=5 y^{6} (4y ^{3} +1)$
The greatest common factor is thus $5 y^{6}$

Q2. The answer is <span>D. 12xy^2
</span>
$12x y^{5}+60 x^{4} y^{2} -24 x^{3} y^{3}=12x y^{5}+5*12 x^{4} y^{2} -2*12 x^{3} y^{3}$
We will use the rule $x^{a}* x^{b} =x^{a+b}$ to factorise the exponents:
$12x y^{5}+5*12 x^{4} y^{2} -2*12 x^{3} y^{3}= \\ =12x*y^{2}*y^{3}+5*12*x* x^{3} *y^{2}-2*12x* x^{2} *y*y^{2}= \\ =12xy^{2}*y^{3}+12xy^{2}*5 x^{3} -12xy^{2}*2 x^{2} y= \\ =12xy^{2}(y^{3}+5 x^{3}-2 x^{2} y)$
The greatest common factor is thus $12xy^{2}$

3 0

3 years ago

Determine the missing angle in each triangle.

tatyana61 [14]

Answer:

104

Step-by-step explanation: