Question

x_2+y_10=11andx_4-y_7=21substitute and elimination method​

Answer 1

Answer:

X=142/27

Y=1/27

Step-by-step explanation:

2X+10Y=11..............eq1

MULTIPLY EQ 1 BY 2

4X+20Y=22..........eq2

4X-7Y=21...............eq3

SUBTRACT EQ 2 FROM 3

27Y=1

Y=1/27

Put value of Y in eq 1

2X+10/27=11

2X=284/27

X=142/27