Question

resolva em R as equações do 1° grau abaixo:
a)6x=2x+16
b)7(x-2)=5(x+3)
c)5(x-3)-4(x+2)=2+3(1-2x)

Answer 1

a)6x=2x+16 ==> 6x - 2x = 16 ==> 4x = 16 ==> x = 4
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b)7(x-2)=5(x+3) = 7x-14 = 5x-15 ==>7x - 5x= -15+14 => 2x=-1 ==> x = - 1/2
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c)5(x-3)-4(x+2)=2+3(1-2x)

5x - 15 - 4x - 8 = 2 + 3 - 6x ==> x + 6x = 5 + 23 ==> 7x = 28 ==> x = 4