uzupełnij. -6(-3x-4) x=-1/2 3/4(x+7y-10) x+2 y+-3 -(9x-4y-1)+3x x=5 y=-5 tylko tyle bo reszte to w szkole zrobiliśmy. pliss prosze na poniedziałek :/
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-6 (-3x - 4) = -6 (1.5 - 4)= -9 + 24 = 15
3/4 * (x + 7y - 10) * x + 2y - 3 -(9x - 4y - 1) + 3x = 3/4 * (5 - 35 - 10) * 5 - 10 -3 - (45 + 20 - 1) + 15=
= 3.75 - 26.25 - 7.5 * 5 - 10 -3 - 64 + 15 = 3.75 - 26.25 - 37.5 - 10 - 3 -64 + 15 =
= - 22.5 - 37.5 - 10 -3 -64 +15 = - 60 - 10 -3 -64 +15 = - 137 + 15 = - 122