2. знайдіть значення змінної, яке задовольняє умовісума виразів 6z + 2 та z - 19на 30 менша від виразу 4z +7
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12.06.2019 10:14
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1
ответ:z=-2.
Объяснение:( 6z+2)+(z-19)+30=4z+7
6z+2+z-19+30=4z+7;
7z-4z=7+19-32;
3z=-6;
z= -2.
Объяснение:
(6z + 2) + (z - 19 ) = (4z +7) - 30,
6z + 2 + z - 19 = 4z +7 - 30,
6z + z - 4z = 7 - 30 - 2 + 19,
3z = -6,
z = -2