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19 May, 14:21

MDI

Solve the following system

-2x + 2y = - 2

2x + 3y = 12

+4
Answers (1)
  1. 19 May, 17:32
    0
    x = 2.25, y = 2.5

    Step-by-step explanation:

    -2x + 2y = - 2 ... equ (1)

    2x + 3y = 12 ... equ (2)

    equ (1) + equ (2)

    -2x + 2y = - 2

    + 2x + 2y = 12

    => 0 + 4y = 10

    => 4y/4 = 10/4

    => y = 2½

    Substitute for y in equ (2)

    i. e, 2x + 3y = 12

    => 2x + 3 (10/4) = 12

    => 2x + 30/4 = 12

    => 2x = 12 - 30/4

    => 2x = (48 - 30) / 4

    => 2x = 18/4

    => 8x = 18

    => x = 18/8

    => x = 2^2/8 or 2.25

    x = 2.25, y = 2.5
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