1) resolva as equações de primeiro grau
A) 3x +4= 2x+8
B) 2(x+3)- 4= 3(x-1)
C) 8x+2x-5=2x+10
D) 3 (x-2)= √8 +2x-10
E) 7x-8+x= 3x-10+2
A) 3x +4= 2x+8
B) 2(x+3)- 4= 3(x-1)
C) 8x+2x-5=2x+10
D) 3 (x-2)= √8 +2x-10
E) 7x-8+x= 3x-10+2
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3x-2x=8-4
x=4
b) 2(x+3)-4=3(x-1)
2x+6-4= 3x-3
2x-3x=-3-6+4
-x=-5(-1)
x=5
c)8x+2x-5=2x+10
10x-2x=10+5
8x=15
x=15/8
x=1,875
d) 3(x-2)= raíz8 +2x-10
3x-6=2,8+2x-10
3x-2x=2,8-10+6
x=-1,2
e) 7x-8+x=3x-10+2
8x-3x=-10+2+8
5x=-8+8
5x=0
x=0