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Simplifying 9876543210987654321 + abcdefghijklmnopqrstuvwxyz = 21 Solving 9876543210987654321 + abcdefghijklmnopqrstuvwxyz = 21 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-9876543210987654321' to each side of the equation. 9876543210987654321 + -9876543210987654321 + abcdefghijklmnopqrstuvwxyz = 21 + -9876543210987654321 Combine like terms: 9876543210987654321 + -9876543210987654321 = 0 0 + abcdefghijklmnopqrstuvwxyz = 21 + -9876543210987654321 abcdefghijklmnopqrstuvwxyz = 21 + -9876543210987654321 Combine like terms: 21 + -9876543210987654321 = -9876543210987654300 abcdefghijklmnopqrstuvwxyz = -9876543210987654300 Divide each side by 'bcdefghijklmnopqrstuvwxyz'. a = -9876543210987654300b-1c-1d-1e-1f-1g-1h-1i-1j-1k-1l-1m-1n-1o-1p-1q-1r-1s-1t-1u-1v-1w-1x-1y-1z-1 Simplifying a = -9876543210987654300b-1c-1d-1e-1f-1g-1h-1i-1j-1k-1l-1m-1n-1o-1p-1q-1r-1s-1t-1u-1v-1w-1x-1y-1z-1
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