Soru

Zorluk: KolaySystems of Linear Equations

In the system of equations below, what is the value of $x$ ?

3x - y = 7

x + y = 5

Cevap: 3

Cevap

The value of

x

is

3

.

Adding the two equations eliminates

y

, resulting in

4x = 12

. Dividing by

4

gives

x = 3

.

Adım Adım Çözüm

1

Add the two equations to eliminate

y

.

4x = 12

Adding the equations

(3x - y) + (x + y) = 7 + 5

eliminates

y

because

-y + y = 0

.

2

Solve for

x

.

x = 3

Divide both sides of the equation

4x = 12

by

4

.

Anahtar Kavram

Solving a system of linear equations by elimination.

Bu soruyu puanla

Konular

Systems of Linear Equations

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