Pleaseeeeeeee helpppppppppppppp

Mathematics

2 answers:

maxonik [38]3 years ago

6 0

Answer:

5. x+y=-4

x=-4-y

-4-y-y=2

-2y=6

y=-3

x-3=-4

x=1

7. (1)+(2), -3x-4y+3x-y=-1-4

-5y=-5

y=1

3x-1=-4

x=-1

katen-ka-za [31]3 years ago

3 0

Answer:

5.x=-2,y=-2

7. y=1 , x=-1

Step-by-step explanation:

5. x+y=-4 equation 1

x-y=2 equation 2

x=-2

Equation 1, x=-2

-2+y=-4

y=-2

-3x-4y=-1 equation 1

3x-y=-4 equation 2

-5y=-5

y=1

Equation-1 ,y=1

-3x-4=-1

-3x=3

x=-1

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zaharov [31]

$\left|x-\dfrac 12\right| = 3\dfrac 23\\\\\\\implies \left|x- \dfrac 12 \right| = \dfrac{11}3\\\\\\\implies x-\dfrac 12 = \dfrac{11}3 ~~~~~~~~~ \text{or}~~~~~~~ x - \dfrac 12 = - \dfrac {11}3\\\\\\\implies 2x -1 = \dfrac{22}3 ~~~~~~~~ \text{or}~~~~~~~~2x-1 =-\dfrac{22}3\\$

$\implies x =\dfrac 12\left(\dfrac{22}3 +1 \right) ~~ \text{or}~~~~~~~~ x = \dfrac 12 \left(1-\dfrac{22}3\right)}\\\\\\\implies x = \dfrac{25}6~~~~~~~~~~~~~~~ \text{or}~~~~~~~~ x=-\dfrac{19}6\\\\\\\implies x = 4\dfrac 16 ~~~~~~~~~~~~~~~ \text{or}~~~~~~~~x = -3\dfrac16$