Номер 1039 пж решите срочно

Question

Номер 1039 пж решите срочно

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Answer 1

1) 5(x-0.2) = 0
5x - 1 = 0
5x = 1
x = 0.2

2) 0.8(y -7) = 8
0.8y - 5.6 = 8
0.8y = 13.6
y = 17

3) 5x -1/8(0.125) = 3
5x = 3.125
x = 0.625

4) 4x - 9/5(1.8) = 5.4
4x = 7.2
x = 1.8