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L
8 tháng 9 2019
12 + ( 5 + x ) = 20 5.22 + ( x + 3 ) = 52 23 + ( x + 3 ) = 52 43 - ( x - 2 ) = 52
17 + x = 20 5.4 + x + 3 = 25 8 + x + 3 = 25 64 - x + 2 = 25
x = 20 - 17 20 + 3 + x = 25 11 + x = 25 66 - x = 25
x = 3 23 + x = 25 x = 25 - 11 x = 66 - 25
x = 25 - 23 x = 14 x = 41
x = 2
Đăng nhìu v bn :) Đáng quan ngại đây :)
28 tháng 1 2018
179 - 58 + 15 + 58 - 75
= 121 + 15 + 58 - 75
= 136 + 58 - 75
= 194 - 75
= 119
( -5 ) * 9 * 2 * 15
= ( -45 ) * 2 *15
= ( -90 ) * 15
= -1350
159 * ( -13 ) - ( -13 ) * 59
= ( -13 ) * ( 159 - 59 )
= ( -13 ) * 100
= -1300
( -109 ) - ( -2 )^3 * ( 6 - 7 )
= ( -109 ) - ( -8 ) * ( -1 )
= ( -109 ) - 8
= -117
14 tháng 10 2018
Bo may la binh day k di hieu ashdbfgbgygygggydfsghuyfhdguuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu3
\(\left(550-x\right)+7^2=109\)
\(\left(550-x\right)+49=109\)
\(550-x=109-49\)
\(550-x=60\)
\(x=550-60\)
\(x=490\)
\(\left(550-x\right)+7^2=109\)
\(\Rightarrow\left(550-x\right)+49=109\)
\(\Rightarrow550-x=109-49\)
\(\Rightarrow550-x=60\)
\(\Rightarrow x=550-60\)
\(\Rightarrow x=490\)
Vậy: x=490