Tìm x, biết a) x - 5/12 - 4/9 = -13/18 b) 2 - (x + 3/7) = 9/-21
Giải thích
a)
x−512−49=−1318x=−1318+512+49x=−2636+1536+1636x=536
b)
2−x+37=9−212−x−37=−37−x=−37+37−2−x=−2⇒x=2
a)
x−512−49=−1318x=−1318+512+49x=−2636+1536+1636x=536
b)
2−x+37=9−212−x−37=−37−x=−37+37−2−x=−2⇒x=2