16:(9-Х)+8=10; (4хХ-130):7=50
16 :( 9 - х ) + 8 = 10
16 :(9 - х ) =10 - 8
16 :(9 -х) = 2
9 -х =16 :2
9 -х =8
х =9 -8
х =1
проверка :
16 : ( 9 - 1 )+8 = 10
10=10
(4 *х - 130) : 7 = 50
4х -130 =50 * 7
4х - 130 = 350
4х =350 +130
4х =480
х =480 : 4
х =120
(4 *120 - 130) : 7 =50
50=50
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Answers & Comments
16 :( 9 - х ) + 8 = 10
16 :(9 - х ) =10 - 8
16 :(9 -х) = 2
9 -х =16 :2
9 -х =8
х =9 -8
х =1
проверка :
16 : ( 9 - 1 )+8 = 10
10=10
(4 *х - 130) : 7 = 50
4х -130 =50 * 7
4х - 130 = 350
4х =350 +130
4х =480
х =480 : 4
х =120
проверка :
(4 *120 - 130) : 7 =50
50=50
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