Question

1v+6b=372
4v+12b=780

Answer 1

v=18, b=59. (18, 59).

Explanation:

v+6b=372

4v+12b=780

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simplify 4v+12b=780 into v+3b=195,

v+6b=372

v+3b=195

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-(v+6b)=-372

v+3b=195

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-v-6b=-372

v+3b=195

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-3b=-177

3b=177

b=177/3

b=59

v+6(59)=372

v+354=372

v=372-354

v=18