Question

154-2×{188-3×[57-2×(a+4:2)]}=0.....afla valoarea lui a???

Answer 1

154-2×{188-3×[57-2×(a+4:2)]}=0
2×{188-3×[57-2×(a+2)]}= 154
188-3×[57-2×(a+2)]= 154 : 2
188-3×[57-2×(a+2)]= 77
3×[57-2×(a+2)] = 188 - 77
3×[57-2×(a+2)] = 111
57-2×(a+2) = 111 : 3
57-2×(a+2) = 37
2×(a+2) = 57-37
2×(a+2) = 20
a+2 = 20 : 2
a + 2 = 10
a = 10-2
a = 8