Question

упростите выражение 5•(21а+3)-11+71а+137

Answer 1

5(21a+3)-11+71a+137
105a+15-11+71a+137
176a+141

Answer 2

5×(21а+3)-11+71а+137=176а+141. 5×21а=105а 5×3=15 105а+15-11+71а+137 105а+71а=176а 15-11+137=141 176а+141