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Use the substitution method to solve y= -7x + 3=

Sagot :

y= -7x + 3
y + 7x = -7x + 7x + 3
y = 7x + 3
7x + 3 = -7x + 3
+7x        +7x     
14x + 3 = 3
         -3  -3
     14x = 0
      14    14
         x = 0
y = -7(0) + 3
y = 0 + 3
y = 3
(x, y) = (0, 3)