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Alecsey [184]
3 years ago
10

Solve question 3 (a and b) — solve each system of equations by elimination.

Mathematics
1 answer:
Nadya [2.5K]3 years ago
3 0

Answer:

Step-by-step explanation:

hello :

6x+5y=-20.....(*)

-6x-10y=25.....(**)

add(*) and(**) :  -5y=5    so y= -1

multiply (*) by 2   : 12x+10y=-40 ...(***)

now add(**) and (***) : 6x=-15   so x = -15/6 = -5/2

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