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4a=20
a=20/4 = 5
2. 2a-3a=-5+1
-a=-4
a= 4
3. 3q -q = 3+1
2q= 4
q = 4/2 = 2
3a+a=18+2
4a=20
a= 20/4
a=5
2. 2a-1=3a-5
2a-3a=-5+1
-a=-4
a= -4/-1
a= 4
3. 3q-1=q+3
3q-q=3+1
2q = 4
q = 4/2
q=2
3a+a=18+2
4a=20
a= 20/4
a=5
2. 2a-1=3a-5
2a-3a=-5+1
-a=-4
a= -4/-1
a= 4
3. 3q-1=q+3
3q-q=3+1
2q = 4
q = 4/2
q=2