Решите пожалуйста номера 190 и 191.

Question

Решите пожалуйста номера 190 и 191.

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Answer 1

190)

x + 12 = 5    x = 5 - 12    x = - 7

x + 6.2 = -7.8    x = -7.8 - 6.2     x = -14

4.8 - x = 16.3   -x = 16.3 - 4.8     x = -11.5

-5.4 - x = -3.5   -x = -3.5 + 5.4    x = -1.9

x - 4.7 = -2.34    x = -2.34 + 4.7   x = 2.36

191)

73 - a + b - 34.2 + a = (73 - 34.2) + ( -a + a) + b = 38.8 + b

6.7 + m + 5.4 -m = (6.7 + 5.4) + (m- m) = 2.1