Answer:
B) Variables on both sides
Step-by-step explanation:
Solving a Linear Equation
Some basic steps are needed to solve a linear equation. We must operate every multiplication or division by applying the correspondent distributive property. Then we must separate variables from constants, then we must collect like terms, and finally, we must isolate the variable by using the division property of equality.
In the example provided in the question, we have
Solve -2(7 - 3x) = 4(-3x + 3)
We apply the distributive property on both sides of the equation:
-14 + 6x = -12x + 12
Now we must see where are the variables in both sides of the equation and prepare to have them all in one side (usually the left side)
Answer: B) Variables on both sides
Note: The option doesn't clearly state what are we going to do with the variables on both sides, I assumed to observe and prepare the variables for the next step
3x-2y=19
Y=x-7
Answer:
x = 5 and y = -2
Step-by-step explanation:
Here you have given what y is equal to, this means you can sub this into the first equation:
3x - 2(x - 7) = 19
Expand the brackets:
-2 * x = -2x
-2 * -7 = 14
3x -2x +14 = 19
Move the +14 over to the other side making it a -14:
3x - 2x = 19 - 14
3x - 2x = 5
3x - 2x = x
So x = 5
Now sub this into the first equation:
3(5) - 2y = 19
15 - 2y = 19
Move the -2y over to the other side making it a +2y, and move the +19 over to the other side making it a -19:
15 - 19 = 2y
-4 = 2y
Divide both sides by two:
y = -2
So x = 5 and y = -2
7,-9, 6, -10, -13, -5
90 is not a square number because you cannot multiple two of the same number to get 90.
For example, 4 is a square number, because 2 x2 = 4
Likewise, 9 is a square number (3 x3), and 81 is a square number (9 x 9)