Х+4=7, 2х+6=30, х-8=3, 4х-7+6=11

Question

Х+4=7, 2х+6=30, х-8=3, 4х-7+6=11

Answer 1

Х + 4 = 7
х = 7 - 4
х = 3
----------------
3 + 4 = 7
      7 = 7

2х + 6 = 30
2х = 30 - 6
2х = 24
х = 24 : 2
х = 12
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2 * 12 + 6 = 30
      24 + 6 = 30
            30 = 30

х - 8 = 3
х = 3 + 8
х = 11
------------------------
11 - 8 = 3
       3 = 3

4х - 7 + 6 = 11
4х = 11 - 6 + 7
4х = 12
х = 12 : 4
х = 3
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4 * 3 - 7 + 6 = 11
   12 - 7 + 6 = 11
                11 = 11