Question

rezolvati in multimea nr rationale pozitive urnatoarele ecuatii a)x+0,7=1,8 b)3×x=15,63c)(8,7-2x)÷0,3=5

Answer 1

a)x+0,7=1,8
x=1,8-0,7
x=1,1

b)3×x=15,63
x=15,63/3
x=5,21

c)(8,7-2x)÷0,3=5
8,7-2x=5 × 0,3
8,7-1,5=2x
2x=7,2
x=-3,6