Question

rezolvati ecuatiile 42x6+x-13x7=256+13x5 74+3x(86-7x3)=x+5x(196-7x20) 37x24x5-x=100-7x9

Answer 1

42*6+x-13*7=256+13*5 => 252+x-91=256+65 => 252+x-91=321 =>x=160

74+3(86-7*3)=x+5(196-7*20) => 74+3*65=x+5*56 => 74+195=x+280 => 269=x+280 => x=-11

37*24*5-x=100-7*9 => 4440-x=37 => x=4403