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Daniel [21]
2 years ago
6

3x+2y-z+5w=20 y=2z-3w z=w+1 2w=8 Solve this system.

Mathematics
2 answers:
SCORPION-xisa [38]2 years ago
8 0

Step-by-step explanation:

or , w = 8/2

or , w = 4

i think this is the answer

drek231 [11]2 years ago
6 0

Start from the last equation:

2w = 8   ⇒   w = 4

z = w + 1   ⇒   z = 4 + 1   ⇒   z = 5

y = 2z - 3w   ⇒   y = 2•5 - 3•4   ⇒   y = -2

3x + 2y - z + 5w = 20   ⇒   3x + 2•(-2) - 5 + 5•4 = 20

⇒   3x = 9   ⇒   x = 3

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