4a + 3c= 156 3a + 4c= 145 Solve for a and c

Question

4a + 3c= 156
3a + 4c= 145

Solve for a and c

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Brielle 3 weeks 2022-01-07T16:05:26+00:00 1 Answer 0 views 0

Answers ( )

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    2022-01-07T16:06:38+00:00

    Answer:

    c = 16, a= 27

    Step-by-step explanation:

    -3(4a + 3c) = -3(156)             Find a GCF

    4(3a + 4c) = 4(145)                Make one negative to cancel out one variable

    -12a – 9c = -468                    Solve for C

    12a + 16c = 580

    7c = 112

    c = 16

    3a + 4c= 145                         Substitute C into one of the original equations

    3a + 4(16) = 145                     Solve for A

    3a + 64 = 145

    3a = 81

    a = 27

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45:7+7-4:2-5:5*4+35:2 =? ( )