benjones benjones

27-01-2017
Mathematics

contestada

A.(-5/7,2/7)
B. Infinite solutions
C. No real solutions
D. (2/7,-5/7)

A5727 B Infinite solutions C No real solutions D 2757 class=

Respuesta :

texaschic101 texaschic101

27-01-2017

3x + 4y = -2
y = x - 1

3x + 4(x - 1) = -2
3x + 4x - 4 = -2
7x = -2 + 4
7x = 2
x = 2/7

y = x - 1
y = 2/7 - 1
y = 2/7 - 7/7
y = -5/7

solution is : (2/7,-5/7)

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