6x - 2y - 3z = 4

3x + 2y + 2z = 7

9x - 3y + 3z = -9

X= 1, Y= 4, Z= -2

Step-by-step explanation:

(3(6x-2y-3z=4)) + (-2(9x-3y+3z=-9))

Z=-2

Substitute in Z

(6x-2y+6=4) + (3x+2y-4z=7)

X=1

Substitute in Z and X

3+2y-4=7

Y=4

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116