Question

solve x+y=7;3x-2y=11 by cross multiplication method​

Answer 1

Given :- solve x+y=7; 3x-2y = 11 .

Solution :-

→ x + y = 7 --------- Eqn.(1)

→ 3x - 2y = 11 ------- Eqn.(2)

multiply Eqn.(1) by 2 and adding both,

→ 2(x + y) + (3x - 2y) = 2*7 + 11

→ 2x + 3x + 2y - 2y = 14 - 11

→ 5x = 3

→ x = (3/5)

putting value of x in Eqn.(1) now we get,

→ (3/5) + y = 7

→ y = 7 - (3/5)

→ y = (35 - 3)/5

→ y = (32/5)

therefore, x is equal to (3/5) and y is equal to (32/5) .

Learn more :-

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. Find all the zeroes of the polynomial x4

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