1) 8×(y-7)-12=4
8y-56-12=4
8y=4+12+56
8y=72
y=9
2) -6×(3a-b)+(7a+8b)×(-4)
-18a+6b-28a-32b= -46a-26b
8×(y-7)-12=4
8y-68=4
y=72/8
-6×(3a-b)+(7a+8b)×(-4)=
=-18a+6b-28a-32b=-46a-26b
1) 8×(y-7)-12=4
8y-56-12=4
8y=4+12+56
8y=72
y=9
2) -6×(3a-b)+(7a+8b)×(-4)
-18a+6b-28a-32b= -46a-26b
8×(y-7)-12=4
8y-56-12=4
8y-68=4
8y=72
y=72/8
y=9
-6×(3a-b)+(7a+8b)×(-4)=
=-18a+6b-28a-32b=-46a-26b