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3a-2b=-10. equation 1
2a+3b=2. equation 2
from equation 1
3a-2b=-10
3a=-10+2b
a=(-10+2b)/3
now put value of a in equation 2
2a+3b=2
2(-10+3b)/3+3b=2
(-20+4b)/3+3b=2
(-20+4b+9b)/3=2
13b-20=2×3
13b=6+20
13b=26
b=26/13
b=2
now put value of b=2 in equation 1
3a-2b=-10
3a-2(2)=-10
3a-4=-10
3a=-10+4
3a=-6
a=-6/3
a=-2
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