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icang [17]
3 years ago
13

What is the answer to this equation using substitution x+y=1

Mathematics
1 answer:
FromTheMoon [43]3 years ago
4 0
{   x + y = 1    * ( - 2 )
  2 x + 3y = -4

- 2 x - 2 y = - 2
  2 x + 3 y = - 4
_______________
         y = - 6

Subsititute y = - 6 
<span>
2 x + 3 y = - 4

2 x + 3 * (-6) = -4

2 x - 18 = - 4

2 x = - 4 + 18

2 x = 14

x = 14 / 2

x = 7

The solution  to the system of equations are:

x = 7 and y = - 6

hope this helps!</span>
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1/3(y - 2) -5/6 (y + 1) =3/4 (y - 3) - 2
Nataly [62]

Answer:

y=\frac{11}{5}

Step-by-step explanation:

Given expression

\frac{1}{3}(y-2)-\frac{5}{6}(y+1)=\frac{3}{4}(y-3)-2

To solve for y for the given expression.

Solution:

We multiply each term with the least common multiple of the denominators of the fraction in order to remove fractions.

The multiples of the denominators are:

3 = 3,6,9,<u>12</u>,15

6 = 6,<u>12</u>

4 = 4,8,<u>12</u>

The least common multiple = 12.

Multiplying each term with 12.

12.\frac{1}{3}(y-2)-12.\frac{5}{6}(y+1)=12.\frac{3}{4}(y-3)-2(12)

4(y-2)-10(y+1)=9(y-3)-24

Using distribution.

4y-8-10y-10=9y-27-24

Simplifying.

-6y-18=9y-51

Adding 6y both sides.

-6y+6y-18=9y+6y-51

-18=15y-51

Adding 51 both sides.

-18+51=15y-51+51

33=15y

Dividing both sides by 15.

\frac{33}{15}=\frac{15y}{15}

\frac{33}{15}=y

Simplifying fractions.

\frac{11}{5}=y

∴ y=\frac{11}{5}  (Answer)

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3 years ago
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Answer: d + q  <u>></u> 17

Step-by-step explanation:

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Flura [38]

Answer:

12,0 is the y intercept

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Step-by-step explanation:

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4 years ago
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Which is the most efficient way to solve this equation 8m=48
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Answer:

by transposing method

m=48/8

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