Question

(iii) x + y = 11; 2x – 3y = 7 by substituting method
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Answer 1

Answer:

$x + y = 11 \\ 2x - 3y = 7$

equation one multiply by 3

$3x + 3y = 33 \\ 2x - 3y = 7$

$x + y = 11 \\ 8 + y = 11 \\ y = 3$

that's is your answer

$5x = 40 \\ x = 8$