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5 April, 00:50

4.

Solve the shape equation puzzle:

A + A + A + B + B=20

B + A + A=13

+2
Answers (2)
  1. 5 April, 02:10
    0
    3A+2B=20

    2A+B=13 ➡ * (-2) ➡-4A-2B=-26

    3A+2B-4A-2B=20-26

    -A=-6 ➡A=6

    2 (6) + B=13➡B=1
  2. 5 April, 02:48
    0
    A = 6, B = 1.

    Step-by-step explanation:

    3A + 2B = 20

    2A + B = 13 Multiply this by - 2:

    -4A - 2B = - 26 Add this equation to the first equation:

    -A = - 6

    A = 6.

    and from the second equation:

    2 (6) + B = 13

    B = 13 - 12 = 1.
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