Question

Aflati x din egalitatile : a) 15 + 143 + 2 ori (X + 3) = 2 ori ( 15 - 7 ori 2 ) ori 100 + 18 ori 36 =

b ) 28 + 2030 + 2 ori ( X + 5 ) = 3 ori ( 81 - 7 ori 5 ) ori 101 =

Answer 1

a) 15+143+2×(X+3)=2×(15-7×2)×100+18×36
158+2X+6=2×(15-14)×100+648
142+2X=2×100+648
142+2X=200+648
2X=848-142
2X=706
X=353

b) 28+2030+ 2×(X+5)=3×(81-7×5)×101
2058+2X+10=3×(81-35)×101
2068+2X=3×46×101
2068+2X=138×101
2X=13938-2068
2X=11870
X=5935

Answer 2

148+2x+6=2*(15-14)*100+18*36 154+2x=200+648   2x=200+648-154

2x=694 x=347