2) Determine a raiz de cada
equação:
a)
3 (x + 3) – 1 = 2 resposta x
= - 2
b) 3 (x + 2) = 2 (x – 7) resposta x = - 20
c) 3 ( x + 2) – 1 = 2 (x + 3)
– 7 resposta x = - 6
d) 3 (x + 1) + 2 = 5 + 2 (x –
1) resposta x = - 2
e) 5 (2X + 7) – 1 = 4 (X – 5)
+ 9 resposta x = - 15/2
Respostas
respondido por:
6
a)3x+9-1=2 --- x=-6/3 ----x=-2
b)3x+6=2x-14 ---- x=-20
c)3x+6=2x+6-7 ---- x=5-2-2-3 ---- x=-2
d)3x+3+2=5+2x-2 --- x=5-2-2-3 --- x=-2
e) 10x+35-1=4x-20+9 --- 6x=-20+9-35+1 ---- 6x=-45 --- 2x=-15 --- x= -15/2
b)3x+6=2x-14 ---- x=-20
c)3x+6=2x+6-7 ---- x=5-2-2-3 ---- x=-2
d)3x+3+2=5+2x-2 --- x=5-2-2-3 --- x=-2
e) 10x+35-1=4x-20+9 --- 6x=-20+9-35+1 ---- 6x=-45 --- 2x=-15 --- x= -15/2
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