Question

resolva as seguintes equações de 1 grau. a)13x-11=15x+21

b) 3(x+5)-(x+7)=4 (1-x)

c)x-3+x/6=1/3 (x-7/2)

d) 9x=21-5x

e) 23x-16=14-17x

Answer 1

a)
13x-11=15x+21
13x-15x=21+11
-2x=32
x=-32/2
x=-16


B)
3(x+5)-(x+7)=4(1-x)
3x+15-x-7=4-4x
3x-x+4x=4+7-15
6x=-4
x=-4/6
x=-2/3


D)
9x=21-5x
9x+5x=21
14x=21
x=21/14
x=3/2


E)
23x-16=14-17x
23x+17x=14+16
40x=30
x=30/40
x=3/4