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a.340
b. 40
a)340
b)40
+ x + = +
- x - = +
+ x - = -
- x + = -
8x-17x 5 /-2
-136 x 5 /-2
-680/-2
340
-4x-35 x -18/-9 /7
140 x 2 / 7
280/7
40
ahi si :3