x-6+12=48( )
解:x-18=48
x=66
(x+4)×21=105( )
解:x+4×21=105
x=105-84
x=21
175-x+24=46( )
解:175-x=46-24
x=175-22
x=153
13+9x=25×7( )
解:13+9x=175
9x=175-13
9x=162
x=18
4x-4=4×6 ( )
解:3x=24
x=8
5x+0.5×3=8.5( )
解:5x+1.5=8.5
5x=8.5+1.5
5x=10
x=2
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2