John has 312 marbles than Zack
Zack has 3 times as many marbles as John
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x + 312. -. 1
3x. -. 2
3x = x +312
3x - x = 312
2x = 312
x = 312÷2
x = 156
no.of marbles John has = x + 312
= 156 + 312
= 468
no.of marbles Zack has
= 3x
= 3 × 156
= 468
3x. -. 2
3x = x +312
3x - x = 312
2x = 312
x = 312÷2
x = 156
no.of marbles John has = x + 312
= 156 + 312
= 468
no.of marbles Zack has
= 3x
= 3 × 156
= 468
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