Explicación paso a paso:
a 3x+8=23
(3x+8 )+(-8)=23+(-8)
X=5
b -7x+12= -12
(-7x+12)+(-12)= -2+( -12)
X=2
c -4* (x - 1)=16
-(4x-4) =16
(-4x+4)+(-14=16)+(-4)
X=3
D. √x+15 =8
(√x+15)²=8²
²√(x+15)²=64
X=49
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Explicación paso a paso:
a 3x+8=23
(3x+8 )+(-8)=23+(-8)
X=5
b -7x+12= -12
(-7x+12)+(-12)= -2+( -12)
X=2
c -4* (x - 1)=16
-(4x-4) =16
(-4x+4)+(-14=16)+(-4)
X=3
D. √x+15 =8
(√x+15)²=8²
²√(x+15)²=64
X=49