Thanks in advance.

[Hitoru]

Simultaneous equations: find the value of x and y.


5x + 2y = 20
3x + y = 14


Please show working out.

 

[blamocur]

• https://www.khanacademy.org/test-pr...e--solving-system-of-linear-equations--lesson
• https://www.varsitytutors.com/hotmath/hotmath_help/topics/solving-systems-of-linear-equations
• https://en.wikipedia.org/wiki/System_of_linear_equations#Elimination_of_variables

 

[jherc2021]

Simultaneous equations: find the value of x and y.


5x + 2y = 20
3x + y = 14


Please show working out.

5x + 2y = 20 - ①
3x + y = 14 - ②

2 * ② : 6x + 2y = 28 - ➂

➂ - ① : x = 28 - 20 = 8 (Ans)
Sub into ② :

3 (8) + y = 14
24 + y = 14
y = -10 (Ans)

 

[Deleted member 4993]

5x + 2y = 20 - ①
3x + y = 14 - ②

2 * ② : 6x + 2y = 28 - ➂

➂ - ① : x = 28 - 20 = 8 (Ans)
Sub into ② :

3 (8) + y = 14
24 + y = 14
y = -10 (Ans)

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