Question

- 2х + 10y = -20
3х - 10=30
substitute please​

Answer 1

Answer:

Hey mate! Here is ur answer...

Step-by-step explanation:

-2x+10y = -20

-x+5y = -10

-x = -10-5y

x = 5y+10

Putting value of x in (3x-10y = 30)

3x-10y = 30

3(5y+10)-10y = 30

15y+30-10y = 30

5y+30 = 30

5y = 0

y = 0/5

y = 0

Putting y = 0 in x = 5y+10

x = 5×0+10

x = 0+10

x = 10

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Answer 2

★ Given Equations:-

• -2x + 10y = -20.......(1)
• 3x - 10y = 30........(2)

⠀

★ Solution:-

$\red{From\: 1st\: equation}$

-2x + 10y = -20

-2x = -20 - 10y

x = $\frac{-20 -10y}{-2}$

➠ $\green{substituting\: the\: value\: of\: x\: in\: 2nd}$

$\green{equation}$

3x - 10y = 30

3 × $\frac{-20 -10y}{-2}$ - 10y = 30

3 × $\frac{-20 -10y - 20y}{-2}$ = 30

3 × $\frac{-20 -30y}{-2}$ = 30

3 × (-20 - 30y) = -60

-60 - 90y = -60

-90y = 0

$\boxed{y = 0}$

Now,

➠ $\green{putting\: the\: value\: of\: y\: in\: 1st\: equation}$

-2x + 10y = -20

-2x + 10×0 = -20

-2x = -20

x = $\frac{-20}{-2}$

$\boxed{x\: = 10}$

___________________

$\mathfrak \blue{Hence....}$

• Value of x = 10
• Value of y = 0