Question

3x + 7 = 0
$3x + 7 = 0$
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Answer 1

Hey

Cross- multiplication method is a method for solving linear equation of two variables.

If two linear equations are

a₁x+b₁y+c₁=0

a₂x+b₂y+c₂=0

Then the solution is

\frac{x}{b_1c_2-b_2c_1}=\frac{y}{a_2c_1-a_1c_2}=\frac{1}{a_1b_2-a_2b_1}

b

1

c

2

−b

2

c

1

x

=

a

2

c

1

−a

1

c

2

y

=

a

1

b

2

−a

2

b

1

1