1. Сначала упрости, затем подставь значения и вычисли.
(a + b) • 235 +349 • a +35 • b
456 • (c + d) - 55•d
306•c - (15•d+45•d)
134 • (a - b) – 767 • b + 490 • а
a=3
b=2
c=4
d=5​
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