x + 315 = 311 + 5
x + 315 = 316
x = 316 - 315
x = 1
\(x+315=311+5\)
\(x+315=316\)
\(x=316-315\)
\(x=1\)
x+315=311+5
x+315=316
x=316-315
x=1
Vậy x=1
*** mk nha
x + 315 = 311 + 5
x + 315 = 316
x = 316 - 315
x = 1
x+315=311+5
x+315=316
x =316-315
x =1
tk mk mk tk lại
x + 315 = 311 + 5
x + 315 = 315
x = 315 - 315
x = 0
x+315=311+5
x+315=316
x=316-315
x=1
k mình nha