Câu hỏi của cuongpx13 phu

Question

Tìm xEN biết
a)239-(x+78)=103
b)13×x=1339
c)4×x+60=8×9
d)(2x+12)×59049=4×531441

⭐Hannie⭐ · Accepted Answer

`a)239-(x+78)=103``=> x+78=239-103``=>x+78=136``=>x=136-78``=>x=58``b)13×x=1339``=>x=1339:13``=>x=103``c)4×x+60=8×9``=>4×x+60=72``=>4xx x=72-60``=>4xx x=12``=>x=12:4``=>x=3``d)(2x+12)×59049=4×531441``=>(2x+12)×59049=2125764``=>2x+12=2125764:59049``=>2x+12= 36``=>2x=36-12``=>2x=24``=>x=24:2``=>x=12` Câu trả lời: `a)239-(x+78)=103``=> x+78=239-103``=>x+78=136``=>x=136-78``=>x=58``b)13×x=1339``=>x=1339:13``=>x=103``c)4×x+60=8×9``=>4×x+60=72``=>4xx x=72-60``=>4xx x=12``=>x=12:4``=>x=3``d)(2x+12)×59049=4×531441``=>(2x+12)×59049=2125764``=>2x+12=2125764:59049``=>2x+12= 36``=>2x=36-12``=>2x=24``=>x=24:2``=>x=12`

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