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Alenkinab [10]
3 years ago
6

3x+y=5  2x-2y=-2 solving systems of equations

Mathematics
2 answers:
8_murik_8 [283]3 years ago
7 0
3x+y=5
2x-2y=-2
x+3y=7
x+3y-3y=7-3y
x=7-3y
3(7-3y)+y=5
21-9y+y=5
21-8y=5
21-21-8y=5-21
8y=-16
8y/8=-16/8
y=-2
x=7/3


yarga [219]3 years ago
4 0
3x+y=5 \ \ /*2 \\ 2x-2y=-2 \\ \\ 6x+2y= 10\\ 2x-2y=-2 \\ + ----- \\8x=8 \ \ / :8\\x=1 \\ \\3*1+y=5 \\ y=5-3\\y=2\\ \\ Answer : \\ \\ x=1 \\ y=2
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Simplify this expression: 4(x+3)+3(5-x)
prisoha [69]

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Step-by-step explanation:

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Distribute:

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8 0
2 years ago
Read 2 more answers
Si en 11 cajas de chocolates hay 220 chocolates en total. Calcula cuántos chocolates habrá en total en 5 cajas de chocolates.
pochemuha

Answer:

Habrá 100 chocolates en total en 5 cajas de chocolates.

Step-by-step explanation:

Esta pregunta es resolvida usando proporciones, con lo uso de regla de tres .

11 cajas, 220 chocolates:

Entonces:

\frac{220}{11} = 20

20 chocolates por caja.

Calcula cuántos chocolates habrá en total en 5 cajas de chocolates.

20 chocolates por caja, entonces:

5*20 = 100

Habrá 100 chocolates en total en 5 cajas de chocolates.

6 0
2 years ago
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