Question

A. 2(3x+5) < 3x-11
b. 4(a+2) -3 (2a+5) <_ 3a+8

Answer 1

A. 2(3x+5) < 3x-11
= 6x+10 < 3x-11
= 6x-3x < -11-10
= 3x < -21
= x < -21/3 (/=per)
= x < -7

b. 4(a+2) - 3(2a+5) < 3a+8
= 4a+8 - 6a+15 < 3a+8
= 4a+6a-3a < 8-8-15
= 10a-3a < 0-15
= 7a < -15
= a < -15/7 (/=per)

yg b itu yg habis tanda < -3a / 3a ? kalau - saya tambahin jawaban sama cara nya :)

b. 4(a+2) - 3(2a+5) < -3a+8
= 4a+8 - 6a+15 < -3a+8
= 4a+6a+3a < 8-8-15
= 10a+3a < 0-15
= 13a < -15
= a < -15/13 (/=per)
#maafkalausalah:D