<h2><em><u>REFERS </u></em><em><u>TO</u></em><em><u> THE</u></em><em><u> ATTACHMENT</u></em></h2><h2 /><h2><em><u>HOPE</u></em><em><u> </u></em><em><u>IT</u></em><em><u> HELPS</u></em><em><u> YOU</u></em><em><u>,</u></em></h2>
<h2><em><u>MARK</u></em><em><u> </u></em><em><u>ME</u></em><em><u> AS</u></em><em><u> BRAINLIEST</u></em><em><u>.</u></em></h2>
Answer:
Only Use addition or subtraction if the unknown variable is alone and not combined with a Number .
<u><em>EXPLANATION :</em></u>
Given step 1 to be =
4x = 28
Following the third law,
The correct solution would have been
Divide both sides of the equation by 4
x = 7
Step-by-step explanation:
"A General Rule for Solving Equations
- Simplify each side of the equation by removing parentheses and combining like terms.
- Use addition or subtraction to isolate the variable term on one side of the equation.( Note : This law can only be applies if the variable is alone e.g x and not combined e.g 4x)
- Use multiplication or division to solve for the variable" ( If variable is combined . Example : 4x
Number 9 would be.
v = (4/3) * pi * 7^3
Answer:
it depends on the choices
Step-by-step explanation:
The answer is digit sum method.
Digit sum method is method used to check the sum of sum numbers. If the sum of all of the digits of numbers is equal to the sum of all of the digits of the total sum, then the arithmetic process was correct.
We need to check the sum of <span>104+34+228+877:
</span>104 + 34 + 228 + 877 = 1243
Let's first summarize the digits of individual numbers:
104 *** 1 + 0 + 4 = 5
34 *** 3 + 4 = 7
228 *** 2 + 2 + 8 = 12 *** 1 + 2 = 3
877 *** 8 + 7 + 7 = 22 *** 2 + 2 = 4
Now, let's sum these sums:
5 + 7 + 3 + 4 = 19 *** 1 + 9 = 10 *** 1 + 0 = <u><em>1</em></u>
Then, let's summarize the digits of the total sum:
1243 *** 1 + 2 + 4 + 3 = 10 *** 1 + 0 = <u><em>1</em></u>
Since the sums of the digits on the both sides of equation is 1, than the arithmetic process was correct and the sum of <span>104 + 34 + 228 + 877 is really 1243.</span>