Answer:
Step-by-step explanation:
I have x coins and you have y coins.
According to question we set the following equations.
If you give me 70 coins I will have three times as much money as you:
If I give you 70 coins, then you will have five times as much as me:
Solve by substitution:
Find the value of x:
A. (12 16) + 4
B. (16 + 4) 12
C. 12 * 16 + 12 4
D. 12 (4 + 16)
Solution for
A case about one variable linear quations. We have to solve the equation to get the variable m. Let's isolate the variable m alone at the end of the process on one side of the equation, until the variable will be equal to a value on the opposite side.
We add to both sides:
On the right side for the addition operation, we equate the common denominator by multiplying
Then we combine terms to get:
We divide by the coefficient of m, or in other words, multiply both sides by :
Finally, the solution is obtained as follows
We simplify fractions, both the numerator and denominator are divided equally by 7.
In the form of mixed fractions, we get:
In decimal form, we get
Check the solution into the equation:
Both sides show the same value, so the solution is correct.
Quick steps in summary:
Note:
The important thing to do is how to manipulate both sides of the equation with the algebraic properties of equality such as:
All these processes can occur repeatedly until the isolated variables are obtained on one side of the equation. In the form of fractions, the steps that must be considered are
Let's practice a lot until you get used to and know which operations should be done first.
Grade : Middle School
Subject : Mathematics
Chapter : Linear Equation in One Variable
Keywords : solve, solution, variable, coefficient, 2/7m - 1/7 = 3/14, 5/4, 1 1/4, 1.125, algebraic properties of equality, one, linear equation, isolated, manipulate, operations, add, substract, multiply, divide, fraction, equate, denominator, numerator, both sides, decimal, brainly