Question

2x - 5y = 4
3x + 4y = -17
Solve by elimination

Answer 1

Given:-

➜2x-5y=4-(1)

➜3x+4y=-17-(2)

$\rule{200}{1}$

To Find:-

✪The Value of x&y?

$\rule{200}{1}$

AnsWer:-

☞x=-3

☞y=-2

$\rule{200}{1}$

Explanation:–

✪Multiply eq-(1) by 3✪

↝6x-15y=12–(3)

✪Multiply eq-(2) by 2✪

↝6x+8y=-34–(4)

▼Sub eq-(3)&(4)▼

↝6x-15y=12

↝6x+8y=-34

✪Sign Change✪

↝-23y=46

↝-y=$\frac{\cancel{46}}{\cancel{23}}$

↝y=-2 or $\frac{46}{23}$

✪Using y in (1)✪

↝2x-5×+(-2)=4

↝2x+10=4

↝2x=4-10

↝2x=-6

↝x=$\frac{\cancel{-6}}{\cancel{2}}$

↝x=-3

$\rule{200}{2}$