设甲仓库原来有 x 吨粮,则乙仓库原来有 340 - x 吨粮
x - 15 = 340 - x + 15
x + x = 340 + 15 + 15
2x = 370
x = 370÷2
x = 185
甲 = x = 185
乙 = 340 - x = 155
答:甲仓库原来有 185 吨粮,则乙仓库原来有 155 吨粮.
设甲仓库原来有 x 吨粮,则乙仓库原来有 340 - x 吨粮
x - 15 = 340 - x + 15
x + x = 340 + 15 + 15
2x = 370
x = 370÷2
x = 185
甲 = x = 185
乙 = 340 - x = 155
答:甲仓库原来有 185 吨粮,则乙仓库原来有 155 吨粮.