Question

resolver ecuaciones en
metodo sustitucion (1) 6x-5y= -9. (2) 4x+3y =13

Answer 1

6x - 5y = - 9........(1)
4x + 3y = 13.......(2)
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10x - 2y = 4
5x - y = 2
5x = 2 + y

4x + 3y = 13
4x = 13 - 3y

5x = 2 + y
x + 13 - 3y = 2 + y
x + 11 = 4y
x = 4y - 11

5x = 2 + y
5(4y - 11) = 2 + y
20y - 55 = 2 + y
19y = 57
y = 57/19

x = 4y - 11
x = 4(57/19) - 11
x = 1