Let's translate each sentence into "Math".Pineapple = pOrange = xis means equal Pineapple is 7 times as heavy as an orange: p = 7xPineapple weighs 870 grams more than orange. p = 870 + x Substitute p = 7x into the second equation:7x = 870 + xSubtract x from both sides6x = 870divide by 6x = 145 The orange weighs 145 grams.The pineapple weights 7 times the orange = 7(145) = 1015 grams.