Question

3x + 4y=22 2x +6y=23. (From simultaneous equations)

Answer 1

Heye

your answer ⏬

_______________________

$\boxed {answer}$

$3x + 4y = 22 - - 1 \times 2 \\ 2x + 6y = 23 - - 2 \times 3 \\ \\ \color{red}{on \: solving} \: 1 \: and \: 2 \\ \\ 6x + 8y = 44 \\ 6x + 18y = 69 \\ - - - - - - - \\ ( - )( - )( - ) \\ \: \: \: \: \: 10y = + 25 \\ \: \: \: \: \: \: y = \frac{25}{10} \\ \\ y = \frac{5}{2} \\ \\ \color{red}{from \: 1} \\ \\ = 3x + 4 \times \frac{5}{2} = 22 \\ \\ = 3x + 10 = 22 \\ 3x = 22 - 10 \\ = 3x = 12 \\ x = \frac{12}{3} \\ \\ x = 4 \\ \\ \color{red}{is \: your \: answer}$

______________________

mark me brainliest......

Answer 2

Step-by-step explanation:

Solve equation [2] for the variable y

[2] 4y = -3x + 22

[2] y = -3x/4 + 11/2

// Plug this in for variable y in equation [1]

[1] 2x + 6•(-3x/4+11/2) = 23

[1] -5x/2 = -10

[1] -5x = -20

// Solve equation [1] for the variable x

[1] 5x = 20

[1] x = 4

// By now we know this much :

x = 4

y = -3x/4+11/2

// Use the x value to solve for y

y = -(3/4)(4)+11/2 = 5/2