Question

i) 3x+y=22;2x-7y=7 simultaneous equation ​

Answer 1

Answer:

$1. \: \: \: 3x + y = 22 \: \: : \: \: 2x - 7y = 7 \\ \\ = 21x + 7y =15 4 \: \: + \: \: 2x - 7y = 7 \\ = 23x = 161 \\ = x = 161 \div 23 \\ = x =7 \\ \\ \\ \\ 2. \: \: \: = x = 7 \\ = 3x + y = 22 \\ = 3 \times 7 + y = 22 \\ = 21 + y = 22 \\ = y = \frac{22}{21}$

ANSWER:- x = 7 ; y = 22/21

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Answer 2

Answer:

1.3x+y=22:2x−7y=7

=21x+7y=154+2x−7y=7

=23x=161

=x=161÷23

=x=7

2.=x=7

=3x+y=22

=3×7+y=22

=21+y=22

=y=

21

22

ANSWER:- x = 7 ; y = 22/21

Step-by-step explanation:

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