1)х+12=5 2)х+6,2=-7,8

Question

1)х+12=5
2)х+6,2=-7,8

Answer 1

2)x+6,2=-7,8
-7,8-6,2
-7,8+(-6,2)
X=-14
_________
-14+6,2=-7,8

Answer 2

1) x=5-12
    x=5+(-12)
    x=-12-5
    x=-7

Comments

2) x=-7,8-6,2

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x=-7,8+(6,2)

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x=-14