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stealth61 [152]
3 years ago
13

Short way to solve system of equations by elimination

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
6 0

Answer:

<em>To solve system of equation by elimination, check if the values of x or y are lined up and have the same value.</em>

Or if the are not, take the numbers in x or y to multiply. Use the first to multiply the second equation and the second to multiply the first equation

<em>E</em><em>xample is, for the first step which is in italic form is</em>

<em>          2x + 3y =64...equation 1</em>

<em>           2x - 6y = 75...equation 2</em>

you can just eliminate for x by taking away equation 2 from equation 1

Or for step two which is in light form is

        4x + 3y =64...equn 1

        3x + 7y =80...equn2

to eliminate x, multiply equation 1 by 3 and equation 2 by 4

it will be   12x +12y =192

                 12x +28y =320

now you can solve.

Thanks

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so by proportion

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What is 6.729 x 8.3 (show ur work)
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Write the answer below the equals line

If that answer is greater than nine, write the ones place as the answer and carry the tens digit

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When you've multiplied the ones digit by every digit in the top number, move to the tens digit in the bottom number.

Multiply as above, but this time write your answers in a new row, shifted one digit place to the left.

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Use long addition to add your number columns from right to left, carrying as you normally do for long addition.

Long Multiplication with Decimals

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Z to the power of 2 =1
stiv31 [10]

That would be written as:

z^{2} = 1


And the step-by-step equation would be:

z^{2} = 1 → we take the 2 to the right side of the equation and do the IO*

z = \sqrt{1} →we solve for \sqrt{1}

z = 1 → final answer


*Ps - IO is not an existing term and stands for inverse operation. In this case, because when we take to 2 to the right side of the equation (the 2 is a power) it'll have to turn into a square root (because exponents and roots are inverse operations)



Hope it helped,



BioTeacher101

3 0
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