1) 2-( 0,6х + 1) - 3,4 - 18
2) 2x + 9) - 613
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Răspuns:
1.
2(0,6x+11)-9,4=18
1,2x+22-9,4=18
1,2x+12,6=18
1,2x=18-12,6
1,2x=5,4
x=5,4÷1,2
x=4,5
2. 2(0,7x+9)-6,3=18
1,4x+18-6,3=18
1,4x+11,7=18
1,4x=18-11,7
1,4x=6,3
x=6,3÷1,4
x=4,5