8(2x+9)=56 I need some help with this I just don't get it

2 answers:

8 0

Well, if you know how to find x, it's really just a matter of distributing, and then finding the value of x.

8 is outside the parentheses, and 2x and 9 are inside the parenthesis, telling us that 8 needs to be distributed to the numbers inside the parentheses. Once distributed to both numbers inside the parentheses, you would end up with : 16x + 72 = 56.

Now, there's just the matter of finding the value of x. Let's start with the numbers without any variables with them, and the side that doesn't have the answer. 72. Subtract 72 from both sides, and you're left with : 16x = -16.

We have to isolate the variable, and therefore, we would have to get rid of that 16 with it. So we divide both sides by 16. x ends up by itself, and -16 ÷ 16 is -1.

x = -1

WINSTONCH [101]3 years ago

6 0

X=-1
First, divide both sides by 8 to eliminate 8 on the left side. You should result in 2x+9=7
Second, subtract 9 from both sides, which results in 2x=-2
Third, Divide both sides by 2 and you get x=-1

Substitute -1 for x--> 8(2(-1)+9)=56 --> 8(-2+9)=56 --> 8(7)=56 --> 56=56

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Alex wrote the expanded form for the number 165.038 as "100 60 5 30 8." was he correct? if not, give the correct expanded form.

grin007 [14]

The expanded form for the number 165.038 is 100+60+5+0.03+0.008.

<h3>What is the expended form of decimal numbers?</h3>

Writing decimals in expanded form simply means writing each number according to its place value. This is done by multiplying each digit by its place value and adding them together. Let's look at an example: 2.435. In words, we would say this as two and four hundred thirty-five thousandths.

In the given question expended form 100+60+5+30+8 is wrong.

After decimal point the first digit is at the tenth place and second digit at the hundredth place and third is at the thousandth place and so on....

165.038 = 100+60+5+ $\frac{0}{10}$ + $\frac{3}{100}$ + $\frac{8}{1000}$