13x + 1 = 11x + 8
First, subtract 1 from both sides. / Your problem should look like: 13x = 11x + 8 - 1
Second, simplify 11x + 8 - 1 to 11x + 7. / Your problem should look like: 13x = 11x + 7
Third, subtract 11x from both sides. / Your problem should look like: 13x - 11x = 7
Fourth, simplify 13x - 11x to 2x. / Your problem should look like: 2x = 7
Fifth, divide both sides by 2. / Your problem should look like: x =
Answer:
x = Answer in decimal form: 3.5
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Answer:
200 berlindes
Step-by-step explanation:
Vamos representar
O número total de berlindes na caixa = X
Mármores vermelhos = 20% de X
= 0.2X
Mármores amarelos = 40% de X
= 0.4X
Mármores azuis = 80
Conseqüentemente,
0.2X + 0.4X + 80 = X
Recolher termos semelhantes
80 = X - 0.2X - 0.4X
80 = X - 0.6X
80 = 0.4X
Divida ambos os lados por 0.4
X = 80 / 0.4
X = 200
Uma vez que X representa o número total de berlindes na caixa, portanto, o número total de berlindes na caixa = 200 berlindes