ruth-wilson_60af3987d1e4c
ruth-wilson_60af3987d1e4c
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2(x+1) +5 (x-1)= 7 2x+2+5x-5=7 (muita atenção com o jogo de sinal) 2x+5x+2-5=7 (junte os termos iguais,2x+5x e +2-5 =7) 7x-3=7 7x=7+3 (isole o termo 7x repita o 7,e troque o sinal do 3 para -3) 7x=10 …