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Solve the simultaneous equation plz x

Solve the simultaneous equation plz x-example-1
User Evan Moran
by
4.5k points

2 Answers

5 votes

Answer:

x=4,y=3

Explanation:

x=19-5y if we transpose equation 2 for x.

Plug that into equation 1

4(19-5y)+3y=25

76-20y+3y=25

76-25=17y

51=17y

y=3

Plug y=3 into equation 2

x+5(3)=19

x=19-15=4

User Enigo
by
4.4k points
3 votes

Answer :

  • Value of x is 4
  • Value of y is 3

Explaination :

We are having two equations,

  • 4x + 3y = 25 (Equation No 1)
  • x + 5y = 19 (Equation No 2)

From Equation No 2 :-

>> x + 5y = 19

>> x = 19 - 5y

From Equation No 1 :-

Substitute here the value of x which we got above as (19 - 5y).

>> 4x + 3y = 25

>> 4 (19 - 5y) + 3y = 25

>> 4 × (19 - 5y) + 3y = 25

>> 76 - 20y + 3y = 25

>> 76 - 17y = 25

>> -17y = 25 - 76

>> -17y = -51

>> 17y = 51

>> y = 51 / 17

>> y = 3

Finding out value of x :-

>> x = 19 - 5y

>> x = 19 - 5(3)

>> x = 19 - 5 × (3)

>> x = 19 - 15

>> x = 4

User Hartmut Holzgraefe
by
4.3k points