Answer:
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Step-by-step explanation:
6(a + 2b +3c) =
6a +12b+18c
Equation 1: x = 5 y/ 2 − 14 and y = 2 x /5 + 28/5
Equation 2: y = 9 + 2 z/ 7 and z = − 63 /2 + 7 y/ 2
Equation 3: y = 7 /3 − 2 z /3 and z = 7/ 2 − 3 y /2
