解方程.5(x-3.5)=26.5
解方程.5(x-3.5)=26.54x-2.4×4=25.6(x-6)÷4=82x+1.6×8=15....
解方程.5(x-3.5)=26.5 4x-2.4×4=25.6 (x-6)÷4=8 2x+1.6×8=15.
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(1)5(x-3.5)=26.5,
5(x-3.5)÷5=26.5÷5,
x-3.5=5.3,
x-3.5+3.5=5.3+3.5,
x=8.8;
(2)4x-2.4×4=25.6,
4x-9.6=25.6,
4x-9.6+9.6=25.6+9.6,
4x=35.2,
4x÷4=35.2÷4,
x=8.8;
(3)(x-6)÷4=8,
(x-6)÷4×4=8×4,
x-6=32,
x-6+6=32+6,
x=38;
(4)2x+1.6×8=15,
2x+12.8=15,
2x+12.8-12.8=15-12.8,
2x=2.2,
2x÷2=2.2÷2,
x=1.1.
5(x-3.5)÷5=26.5÷5,
x-3.5=5.3,
x-3.5+3.5=5.3+3.5,
x=8.8;
(2)4x-2.4×4=25.6,
4x-9.6=25.6,
4x-9.6+9.6=25.6+9.6,
4x=35.2,
4x÷4=35.2÷4,
x=8.8;
(3)(x-6)÷4=8,
(x-6)÷4×4=8×4,
x-6=32,
x-6+6=32+6,
x=38;
(4)2x+1.6×8=15,
2x+12.8=15,
2x+12.8-12.8=15-12.8,
2x=2.2,
2x÷2=2.2÷2,
x=1.1.
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