8z + 3 - 2z < 51 6z + 3 < 51 6z < 48 z < 6 ☺
z = -2
-8z + 5z = -3z
10x + 2y + 8z - 5x + 4z - 4y = 10x - 5x + 2y - 4y + 8z + 4z = (10 - 5)x + (2 - 4)y + (8 + 4)z = 5x - 2y + 12z
By collecting like terms: 8z+4-2x
2z+6z+24=0 8z+24=0 8z= -24 z= - 3
8z + 3 - 2z < 51 6z + 3 < 51 6z < 48 z < 6 ☺
z = -2
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Z=z
-8z + 5z = -3z
By including its plus or minus signs
10x + 2y + 8z - 5x + 4z - 4y = 10x - 5x + 2y - 4y + 8z + 4z = (10 - 5)x + (2 - 4)y + (8 + 4)z = 5x - 2y + 12z
-8z + 12 = 12 - 4z-8z +4z + 12 = 12 - 4z +4z-4z + 12 -12 = 12 -12-4z / -4 = 0 / -4z = 0:)
By collecting like terms: 8z+4-2x
8z-5 = 11 add 5 to both sides 8z = 16 divide both sides by 8 z = 2
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