x+100-50=300+50
x+100-50=450
x+100=450+50
x+100=500
x=500-100
x=400
x + 100 - 50 = 350
x + 100 = 350+50
x+100= 400
x= 400-100
x=300
x + 100 - 50 = 300 + 50
x + 100 - 50 = 350
x + 100 = 350 + 50
x + 100 = 400
x = 400 - 100
x = 300
x + 100 - 50 = 300 + 50
x + 100 - 50 = 350
x + 100 = 350 + 50
x + 100 = 400
x = 400 - 100
x = 300
x + 100 - 50 = 300 + 50
x + 100 - 50 = 350
x + 100 = 350 + 500
x + 100 = 400
x = 400 - 100
x = 300
k mk nha
x + 100 - 50 = 300 + 50
x + 100 - 50 = 350
x + 100 = 350 + 50
x + 100 = 400
x = 400 - 100
x = 300
X+100-50=300+50
X+100-50=350
X+50=350
X=350-50
X=300