How do yo solve this difficult problem of Equations?

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How do yo solve this difficult problem of Equations?

If you have this equation

Find "x+y"

1 Answer

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Answer 1 · 2018-08-12T19:00:08

$x + y = 6$ $x+y=6$

Explanation:

$2 x + y = 9 \to (1)$ $2x+y=9to(1)$

$3 x - 2 y = 3 \to (2)$ $3x-2y=3to(2)$

$multiply equation (1) by 2$ $"multiply equation "(1)" by 2"$

$4 x + 2 y = 18 \to (3)$ $4x+2y=18to(3)$

$add (2) and (3) term by term$ $"add "(2)" and "(3)" term by term"$

$(3 x + 4 x) + (- 2 y + 2 y) = (3 + 18)$ $(3x+4x)+(-2y+2y)=(3+18)$

$7 x = 21$ $7x=21$

$divide both sides by 7$ $"divide both sides by 7"$

$x = \frac{21}{7} = 3$ $x=21/7=3$

$substitute x = 3 into equation (1)$ $"substitute "x=3" into equation "(1)$

$6 + y = 9 \Rightarrow y = 9 - 6 = 3$ $6+y=9rArry=9-6=3$

$solution is (x, y) \to (3, 3)$ $"solution is "(x,y)to(3,3)$

$hence x + y = 3 + 3 = 6$ $"hence "x+y=3+3=6$

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Math

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How do yo solve this difficult problem of Equations?

If you have this equation

Find "x+y"

1 Answer

Explanation:

Related questions

Impact of this question

Science

Math

Humanities

... and beyond

How do yo solve this difficult problem of Equations?

If you have this equation Find "x+y"

1 Answer

Explanation:

Related questions

Impact of this question

If you have this equation

Find "x+y"