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3 years ago

18m + –5m + 8m + 6 = –15 solve for m

Mathematics

1 answer:

s344n2d4d5 [400]3 years ago

5 0

Answer: M= -1

Step-by-step explanation:

18m + -5m + 8m= -21 (combine like terms)

21m= -21 (bring the positive 21 over to the other side by dividing)

m = -1

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Tell weather the two rates form a proportion. help

Sindrei [870]

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u could also check it this way...
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3 years ago

Solve the simultaneous linear equation 2x+5y=11, 7x+4y=2

Andrews [41]

Answer:

x = - $\frac{34}{27}$ and y = $\frac{73}{27}$

Step-by-step explanation:

2x + 5y = 11

7x + 4y = 2

Let's try elimination here since we have a system of equations:

-7(2x + 5y = 11) = -14x - 35y = -77

and

2(7x + 4y = 2) = 14x + 8y = 4

The x's cancel out now so let's combine the two equations:

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Now that we have y's value, let's plug that value in for y in the other equation. You may choose whichever equation you want to solve for x but it is recommended to use the easiest one. (Since this value is complicated, it won't really matter.)

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2x + $\frac{365}{27}$ = 11

2x = - $\frac{68}{27}$

x = - $\frac{34}{27}$

To check and make sure you have the correct values, plug both values into the orginal equation and make sure the equation is true.

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