Toán Lớp 6: 3+x=-8
(35+)-12=27
2 mũ x+15=31
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Toán Lớp 6: 3+x=-8
(35+)-12=27
2 mũ x+15=31
Comments ( 2 )
3 + x = -8
x = -8 – 3
x = -11
__________
( 35 + x ) – 12 = 27
35 + x = 27 + 12
35 + x = 39
x = 39 -35
x = 4
___________
2^x + 15 = 31
2^x = 31 – 15
2^x = 16
2^x = 2^4
=> x = 4