1. determine a raiz ou solucao das seguintes equacoes, sendo U = Q

f) 2(1,6 + x)+0,5(1+x)=4,2
g) 10(x-1)-7(x+1)=4
h) 1,8x-3(0,2x+1)=0,6(x-2)

as respostas sao:

f) 0,2
g) 7
h) 3

eu quero o calculo por favor
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