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3b + 2a = 2 and -2 + a = 8

-2 + a = 8 can be rearranged to show a = 8 + 2 = 10 (Effectively 2 has been added to both sides.)

As a = 10, the value for a can now be substituted in the equation 3b + 2a = 2

3b + 2x10 = 2 : 3b + 20 = 2 this can be rearranged to show 3b = 2 - 20 = -18

and dividing both sides by 3 gives b = -6.

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14y ago
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Q: How do you solve 3b plus 2a equals 2 and -2 plus a equals 8?
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