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3 years ago

Solve for y y - 9.2 = 8.78

Mathematics

1 answer:

cupoosta [38]3 years ago

3 0

Answer:

<h2>y=17.98 (the answer should have a decimal point.)</h2>

Step-by-step explanation:

Isolate the term of y from one side of the equation.

Add by 9.2 from both sides of an equation.

$\sf{y-9.2+9.2=8.78+9.2}$

Solve.

Add.

8.78+9.2=17.98

$\large\boxed{y=17.98}$

Therefore, the correct answer is y=17.98.

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Step-by-step explanation:

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Solve by the elimination method

Usimov [2.4K]

There is one solution. The solution of the system is (9,-5)

Option A is correct.

Step-by-step explanation:

We need to solve the system of equations by elimination method

$6x= 64+2y\\2x= -7-5y$

Rearranging the equations:

$6x-2y=64\,\,\,eq(1)\\2x+5y=-7\,\,\,eq(2)$

Eliminating y to find value of x:

Multiply eq(1) by 5 and eq(2) by 2 and add both equations:

$30x-10y=320\,\,\,\\4x+10y=-14\\--------\\34x=306\\x=\frac{306}{34}\\ x=9$

So, value of x= 9

Eliminating x to find value of y:

Multiply eq(1) by 2 and eq(2) by 6 and subtract both equations:

$12x-4y=128\\12x+30y=-42\\-\,\,\,\,-\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,+\\---------\\-34y=170\\y=\frac{170}{-34}\\ y=-5$

So, value of y = -5

There is one solution. The solution of the system is (9,-5)

Option A is correct.

Keywords: Solving system of equations

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4 years ago

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Answer: −

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