• How do I isolate a variable?

2 answers:

8 0

Depends on the question but you generally must use a variety of operations to isolate the variable by itself on one side of the equation

WITCHER [35]3 years ago

3 0

Answer:

It means to get the variable by itself. Isolating the variable means rewriting an equivalent equation in which the variable is on one side of the equation and everything else is on the other side of the equation. Hope this helps.

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WILL MARK BRAINLIST

hammer [34]

$2x +y = 20~~....(i)\\\\6x -5y = -4~~....(ii)\\\\\\\text{Multiply equation (i) by 3:}\\\\6x +3y = 60~~...(iii)\\\\(iii)-(ii):\\\\6x+3y - 6x+5y = 60-(-4)\\\\\implies 8y = 60+4 = 64\\\\\implies y = \dfrac{64}8\\\\\implies y = 8\\\\\\\text{Substitute y =8 in equation (i):}\\\\2x+8 =20\\\\\implies 2x = 20-8 = 12\\\\\implies x = \dfrac{12}2 = 6\\\\\text{Hence (x,y) = (6, 8)}$

4 0

2 years ago

Read 2 more answers

You know that a number 8 less than 60 is the number 52. so, you could rewrite your answer from the previous part as, "what numbe

svetoff [14.1K]

I'm a little confused by your question.

You said 60-8 = 52 which is true.

Then, you asked 4x = 52 in an integer form
x = 52/4
x = 13. (Is that what you're asking?)

I'm not sure if this helps, but please comment if you need any help! Hope this helps though! :D

4 0

3 years ago

Help me please I don’t understand

balandron [24]

I think it is B since you and 15% of income and then add 10% tax

5 0

3 years ago

Solves this system of equations by using the elimination method

yuradex [85]

X should equal 6 and y should equal -9

8 0

3 years ago