Toán Lớp 6: 51- (-12 + 3x) = 27
1- (12+3x) = 7
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Toán Lớp 6: 51- (-12 + 3x) = 27
1- (12+3x) = 7
Comments ( 2 )
51- (-12 + 3x) = 27
-12 + 3x = 51 – 27
-12 + 3x = 24
3x = 24 – ( -12 )
3x = 36
x = 36 : 3
x = 12
1- (12+3x) = 7
12+3x = 1 – 7
12+3x = ( -6 )
3x = ( -6 ) – 12
3x = (-18 )
x = ( -18 ) : 3
x = -6
a) 51 – (-12 + 3x) = 27
51 + 12 – 3x = 27
63 – 3x = 27
3x = 63 – 27
3x = 36
x = 36 : 3
x = 12
b) 1 – (12 + 3x) = 7
1 – 12 – 3x = 7
-11 – 3x = 7
3x = -11 – 7
3x = -18
x = -18 : 3
x = -6