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5a-2b=14
2a+2b=14
Bosnian
answered
5 a - 2 b = 14
+
2 a + 2 b = 14
___________
5 a + 2 a - 2 b + 2 b = 14 + 14
7 a = 28
a = 28 / 7 = 4
Put this value in equation:
5 a - 2 b = 14
5 ∙ 4 - 2 b = 14
20 - 2 b = 14
Subtract 20 to both sides
- 2 b = - 6
b = - 6 / - 2 = 3
Abigail
answered