Toán lớp 6

T

tranvanhung7997

$$219 - 7(x + 1) = 100$$
$$<=> 219 - x - 7 = 100$$
$$<=> x = 219 - 7 - 100$$
$$<=> x = 112$$
 
F

friendoftheworld

219-7(x+1)=100
=> 7(x+1)=219-100
=> 7(x+1)=119
x+1 =119:7=17
x =17-1=16
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