15-01-2018
Mathematics

contestada

PLEASE HELP....... Solve the system of equations using the Addition method. 2a + 3b = -1 3a + 5b = -2

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dannielle dannielle

19-01-2018

2a+3b = -1 | *3
3a +5b = -2 |* -2

6a+ 9b = -3
-6a -10b = 4
------------------
/ -b =1
b= -1

2a + 3b= -1
2a + 3* -1 = -1
2a -3= -1
2a = 3-1
2a=2
a=2:2
a=1

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